Nutraceuticals of Phoenix dactylifera L.: Physicochemistry, Nutritional Value and Therapeutic Potential

Introduction

Phoenix dactylifera L. (date palm) belongs to the Arecaceae family and is one of the oldest cultivated fruit trees, with cultivation dating back over 5000 years to Mesopotamia (present-day Iraq), from where it later spread to North Africa. Today, date palms are cultivated worldwide, particularly in Australia, South America, and the United States, demonstrating their adaptability to diverse climates.¹ In many cultures, particularly in the Middle East, date palms symbolize prosperity and fertility and are often mentioned in ancient texts, including the Bible and the Quran. The species is dioecious, with fruit production restricted to female palms following wind-assisted or manual pollination. Date fruits are nutritionally dense, providing carbohydrates, dietary fiber, vitamins, minerals, and bioactive compounds, making them a traditional functional food and natural energy source. Numerous cultivars exist, each exhibiting distinct sensory attributes and physicochemical properties. The nutritional composition of Phoenix dactylifera L., including proximate components, energy value, and selected micronutrients relevant to human health, is listed in Table 1.²

Table 1 Nutritional Composition and Micronutrient Profile of Phoenix dactylifera L. Date Palm Extract2

Botanically, Phoenix dactylifera L. is a monocotyledonous perennial characterized by a fibrous root system, a cylindrical trunk (stipe), and a crown of large pinnate leaves. These anatomical features underpin the plant’s adaptability and productivity; the detailed descriptions of root architecture, leaf morphology, and trunk structure are summarized in Figure 1. Importantly, the fruit undergoes five well-defined developmental stages (Hababouk, Kimri, Khalal, Rutab, and Tamar), each associated with dynamic changes in moisture content, sugar composition, and phytochemical profile, which are relevant to its nutritional and bioactive properties.¹

Figure 1 Anatomical features and root zone stratification of the Phoenix dactylifera L. date palm. Schematic representation of the mature date palm architecture, illustrating the aerial components, including the crown of leaves, fruit bunch, and offshoot types, and the organized subterranean root system. The root zone is divided into four distinct physiological and depth-related layers (Zones I–IV), which facilitate moisture absorption and structural stability in arid environments.

Despite extensive reporting on the phytochemical composition and in vitro bioactivities of Phoenix dactylifera L., significant gaps remain in translating these findings into nutraceutical development and clinical application. Key challenges include heterogeneity in extraction methods, lack of standardized formulations, limited dose-response and bioavailability data, and a paucity of well-designed clinical studies. Consequently, the therapeutic relevance of many reported biological effects remains largely preclinical.

This review aims to critically evaluate current evidence on the physicochemical properties, nutritional value, and biological activities of Phoenix dactylifera L., with particular emphasis on distinguishing exploratory and preclinical findings from clinically relevant outcomes. The review is structured to first summarize extraction approaches and phytochemical profiles, followed by nutritional composition and biological activities, and concludes with a critical appraisal of limitations and future research priorities needed to advance translational and clinical applications.

Methodology

This review was developed through a comprehensive and structured literature search across several major databases, including PubMed, ScienceDirect, Scopus, and Google Scholar. Studies related to Phoenix dactylifera L. published from 2004 onwards were primarily considered. Literature were identified using the following search terms: “Phoenix dactylifera” OR “ Phoenix dactylifera L.” OR “date palm” AND (“chemistry” OR “in vitro” OR “in vivo” OR “biological properties” OR “extracts” OR “toxicity studies” OR “phytochemistry” OR “pharmacodynamics” OR “pharmacokinetics” OR “pharmaceuticals” OR “therapeutics” OR “nutritional value”).

To provide historical, botanical, and theoretical context, selected references published prior to 2004 were also included when they addressed definitions, origin, initial discovery, traditional uses, early phytochemical characterization, or foundational biological concepts of Phoenix dactylifera L.

As this work was designed as a narrative review rather than a systematic review, formal risk-of-bias assessment and meta-analytic procedures were not performed. Instead, emphasis was placed on thematic synthesis, mechanistic relevance, and translational significance. To minimize selection bias, multiple databases were searched, and studies were evaluated based on scientific rigor and relevance to the stated objectives. Literature not published in English or lacking abstracts was excluded during the initial screening.

In total, this narrative review includes 145 relevant sources. Key findings related to Phoenix dactylifera L.’s extraction methods, nutritional values, phytochemistry, and therapeutic potential (Figure 2), with in-depth analysis in the latter (Figure 3), were synthesized and integrated into the review to support contextual discussion and recommendations.

Figure 2 Conceptual framework of the review paper focusing on the extraction, nutritional, phytochemical, and therapeutic profile of Phoenix dactylifera L. The review integrates the technical aspects of extraction methods with the biological outcomes, including nutritional values and phytochemistry. These elements collectively underpin the therapeutic potentials of the species, ranging from antioxidant and anti-inflammatory activities to more complex metabolic protections.

Figure 3 Schematic summary of the reported therapeutic and pharmacological potential of Phoenix dactylifera L. based on the currently available literature. Bioactive constituents and extracts of P. dactylifera have shown antioxidant and anti-inflammatory activities, which may contribute to a range of reported biological effects in experimental models. Preclinical studies suggest potential anticancer, anti-arthritic, neuroprotective, antiseizure, cardiometabolic, antidiabetic, gastrohepatic, and antimicrobial-related effects; however, much of this evidence remains derived from in vitro, in vivo, or in silico studies, with limited clinical validation. Therefore, these proposed benefits should be interpreted cautiously until supported by standardized human studies.

Discussion

Extraction of Phoenix dactylifera L

Several extraction approaches have been employed to isolate bioactive constituents from Phoenix dactylifera L., with considerable variability in solvents, extraction duration, and plant parts being analyzed. Biglari et al reported a methanol-water extraction protocol in which the edible part of the date palm fruits was pitted, homogenized, and extracted using aqueous methanol under agitation, followed by filtration, centrifugation, and solvent removal under reduced pressure to yield a crude extract.³ This approach is widely adopted for profiling total phenolics and flavonoids but primarily targets polar compounds, potentially underrepresenting lipophilic constituents.

Seed-derived extracts have been obtained using distinct protocols. Soni et al described the extraction of finely ground date seeds (powder) of Phoenix dactylifera using ethanoic acid, followed by prolonged agitation, concentration by boiling, and centrifugation.⁴ However, the lack of standardized extraction duration, solvent concentration, and temperature control limits inter-study reproducibility and quantitative comparison of bioactive yields.

In contrast, Önder et al focused on seed oil extraction using Soxhlet extraction with n-hexane, yielding lipid-rich fractions enriched in fatty acids and other nonpolar constituents.⁵ While suitable for nutritional and cosmetic applications, Soxhlet-based methods are energy-intensive and less compatible with large-scale food or nutraceutical production unless modified to greener extraction technologies.

Collectively, these extraction strategies have been employed primarily for phytochemical characterization and in vitro bioactivity screening. However, the substantial heterogeneity in extraction protocols, solvent systems, and plant matrices remains a major limitation for reproducibility, standardization, and downstream translational development into functional foods, dietary supplements, or pharmaceutical formulations.

Phytochemistry of Phoenix dactylifera L

Phytochemistry involves exploring phytochemicals derived from plants and elucidating the structures of the numerous secondary metabolites present in plants. Phytochemical investigations of Phoenix dactylifera L. date palm predominantly focused on phenolic compounds, which represent one of the most abundant classes of secondary metabolites in this plant.

Phenolic compounds are categorized as chemicals containing at least one phenol unit (hydroxyl group attached to an aromatic ring) in their structure.^1,6 These compounds are broadly divided into different subgroups, including phenolic acids, flavonoids, and tannins, all of which have been discovered in date palm fruits.^1,6–10 Phenolic acids contain a phenolic ring with one or more carboxylic groups, and can be classified into two principal subgroups: hydroxybenzoic acids (benzoic acid derivatives with seven carbon atoms), and hydroxycinnamic acids (cinnamic acid derivatives with nine carbon atoms).^1,11 The basic flavonoid structure consists of a 15-carbon skeleton with two aromatic benzene rings linked by a heterocyclic pyran ring.^12,13 Tannins are high-molecular-weight polyphenols, with structures divided into hydrolysable tannins (derived from gallic or ellagic acid) and condensed tannins (polymers of flavan-3-ol units).¹⁴ Numerous bioactive compounds, such as gallic acid, catechin, epicatechin, p-coumaric acid, ferulic acid, syringic acid, vanillic acid, and quercetin, have been identified across different cultivars.^9,15–17 The chemical structures are illustrated in Figure 4.

Figure 4 Chemical structures of the principal phenolic and flavonoid constituents identified in Phoenix dactylifera L. (A). Phenolic acids include I. hydroxybenzoic acids (1: gallic acid; 2: syringic acid; 3: vanillic acid) and II. hydroxycinnamic acids (4: p-coumaric acid; 5: ferulic acid), while (B) Flavonoids are comprised of I. flavan-3-ols (6: catechin; 7: epicatechin), II. flavonols (8: quercetin), and III. flavones (9: apigenin).

Table 2 summarizes the reported values for the total phenolic content (TPC), total flavonoid content (TFC), and condensed tannin content (CTC) in the date palm cultivars, while Table 3 presents the content of various phenolic acids and flavonoid compounds identified in the date palm fruits. The seeds of date fruits, often discarded as waste, also contain remarkably high levels of polyphenols. A study analyzing seven Phoenix dactylifera L. seed cultivars reported TPC ranging from 135.9 ± 12.1 to 284.9 ± 21.9 mg gallic acid equivalents (GAE)/g dry matter (DM), and TFC ranging from 34.2 ± 0.3 to 94.5 ± 1.0 mg rutin equivalents (RE)/g DM.¹⁸ Phloroglucinolysis of seed extracts further revealed depolymerized flavan-3-ols reaching up to 72.4 g/kg, highlighting its rich polyphenolic composition and antioxidant potential.¹⁸

Table 2 Reported Total Phenolic, Flavonoid, and Condensed Tannin Content of Phoenix dactylifera Date Palm Fruits From Different Studies

Table 3 Comparative Composition of Phenolic Acids (Hydroxybenzoic Acid [3A], Hydroxycinnamic Acid [3B]) and Flavonoids (3C) in Different Phoenix dactylifera Date Cultivars

These phenolic constituents are frequently associated with antioxidant properties, forming the mechanistic basis for proposed roles in the prevention of cancer, cardiovascular disease, and neurological disorders, and metabolic dysfunction.^{10,19,21,25,26,29–31} Multiple studies have also reported other biological activities such as anti-inflammatory,^32,33 antibacterial,^34,35 antiviral,³⁶ and antimutagenic effects.^35,37 Nevertheless, most evidence derives from in vitro assays or short-term animal studies, with limited validation in physiologically relevant models. Direct comparison across studies is also constrained by differences in extraction solvents, analytical assays, and reference standards. The variability in phenolic profile is influenced by factors such as growth stage, genotype, harvest timing, post-harvest storage conditions, diseases, and environmental parameters, including water availability, geographic origin, temperature, fertilizer type, and soil composition.^10,19,21,32.

Nutritional Value of Phoenix dactylifera L

The proximate compositions of the date palm fruits from previous studies are summarized in Table 4. Nutritional analysis consistently indicates high carbohydrate content, with comparatively lower proportions of fat, protein, and fiber.^31,38,39 The carbohydrate content in date palm fruits varies between 40% to 80% and is influenced by factors such as cultivar and ripening stage. The carbohydrate composition includes both reducing sugars (glucose, fructose, maltose, and mannose) and non-reducing sugars (sucrose and polysaccharides),^40,41, with Table 5 highlighting the predominance of glucose and fructose in date palm fruits.^31,39,42

Table 4 Proximate Nutritional Composition (in g/100g) of Different Phoenix dactylifera Date Cultivars

Table 5 Sugar Composition (in g/100g) of Different Phoenix dactylifera Date Cultivars

The mineral composition of date palm fruits (Table 6) reveals potassium as the most abundant mineral, followed by magnesium, calcium, and phosphorus.^34,43,44 This mineral profile supports the use of date palm fruit as a functional food for cardiovascular health, particularly in individuals with hypertension, due to its high potassium and low sodium content.^40,43 Additionally, the substantial potassium content in dates may serve as a valuable nutritional supplement for vulnerable populations, including pregnant women, the elderly, and children.³¹ Owing to their balanced potassium and phosphorus content, together with magnesium and calcium, studies supports the use of date palm fruits as functional dietary component for promoting metabolic and bone health.^31,42

Table 6 Mineral Composition (in mg/Kg) of Phoenix dactylifera Date Fruits From Different Cultivars

Therapeutic Potential of Phoenix dactylifera L

The therapeutic potential of Phoenix dactylifera L. is largely attributed to its phenolic and flavonoid content, which underpins the antioxidant and free radical-scavenging activities.⁴⁵ Multiple preclinical studies provided evidence that these compounds may enhance brain health and cognitive performance by mitigating oxidative stress and modulating inflammatory mediators, thus alleviating memory impairments and inflammation.^46,47

In addition to antioxidant effects, dates provide readily bioavailable energy via naturally occurring carbohydrates as well as essential minerals. Dates have also been used traditionally for the management of digestive disorders and inflammatory conditions.³³ Studies also reported improvements in lipid profiles and blood pressure regulation following consumption of dates, supporting the potential role of date-based products in functional foods or dietary supplements for cardiovascular and metabolic health.^48–50 The following subsections examine the evidence supporting its proposed roles in specific conditions, including neurodegeneration, inflammatory disorders, cancer, arthritis, microbial infections, metabolic diseases, digestive conditions, and cardiovascular dysfunction.

Antioxidant Properties

Both the fruit and seed components of Phoenix dactylifera L. demonstrate significant antioxidant activity, largely attributed to their rich polyphenolic profile.^7,27 Antioxidant assays, such as DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and FRAP (Ferric Reducing Antioxidant Power), have consistently demonstrated their free radical-scavenging activity, which varies considerably depending on cultivar, geographical origin, the stage of fruit ripening, as well as extraction methods.⁵¹ For example, analysis on four cultivars (Zahidi, Aseel, Halawi, and Dhaki) across different ripening stages demonstrated the highest DPPH and FRAP antioxidant activities, alongside TPC and TFC, at the unripe (kimri) stage, particularly in the Dhaki cultivar, and decreased significantly as the fruit matured.^52,53 This heterogeneity complicates cross-study comparisons and highlights the need for standardized phytochemical profiling and extraction protocols to enhance reproducibility. It is also important to note that the chemical assays used primarily measure electron-donating capacity under artificial conditions and do not necessarily reflect in vivo bioavailability, metabolism, or biological efficacy.

Date seed oil has also been shown to exhibit moderate antioxidant activity, with reported ABTS and DPPH IC₅₀ values of 746 and 318 µg/mL, respectively, attributed to phenolic constituents and unsaturated fatty acids.⁵⁴ Due to its potent antioxidant properties, numerous literature have reported that both date fruit and seed extracts may alleviate oxidative stress, subsequently exerting anti-inflammatory, cardioprotective, and metabolic regulatory effects through modulation of related signaling pathways.^18,21,55,56 For example, an aqueous extract of date fruits has been shown to scavenge hydroxyl and superoxide radicals, and consequently prevent DNA and protein oxidative damage in vitro.³ Date fruit extract treatment was also found to restore antioxidant enzyme activities including superoxide dismutase (SOD) and catalase (CAT), and elevated glutathione (GSH) levels, further strengthening its proposed protective role against oxidative stress.⁵⁷

Collectively, current findings support Phoenix dactylifera L. as a promising natural source of dietary antioxidants with potential applications in functional foods, nutraceuticals, and adjunctive preventive medicine against oxidative stress-associated disorders. However, future research should prioritize standardized extract characterization and mechanistic studies to substantiate translational potential.

Anti-Inflammatory Properties

Inflammation is a fundamental component of the immune response; however, persistent or dysregulated inflammation contributes to the pathogenesis of numerous chronic diseases, including cardiovascular disorders, diabetes, autoimmune conditions, cancer, and neurodegenerative diseases.^58,59 Chronic inflammation is characterized by sustained production of reactive oxygen and nitrogen species, activation of cyclooxygenase (COX) pathways, and elevated levels of pro-inflammatory cytokines.⁶⁰ Although nonsteroidal anti-inflammatory drugs (NSAIDs) effectively target these pathways, their long-term use is limited by adverse effects and cost, prompting growing interest in plant-derived alternatives.

Phoenix dactylifera L. is rich in phenolic acids and flavonoids, such as gallic acid, catechin, epicatechin, p-coumaric acid, ferulic acid, syringic acid, vanillic acid, quercetin, apigenin, caffeic acid, rutin, and lutein, which provide a mechanistic basis for its reported antioxidant and anti-inflammatory activities.^9,25,61–64 Multiple preclinical studies have demonstrated that extracts from date fruits, seeds, and pulp significantly reduce inflammation in carrageenan-, croton oil-, formalin-, and egg albumin-induced edema models, likely through modulation of oxidative stress, cytokine release, and inflammatory mediators such as COX, and C-reactive protein (CRP).^{25,32,65–70}

Additional animal studies have reported anti-inflammatory effects of Phoenix dactylifera L. fruit extracts in models of gastric ulceration, burn-induced systemic inflammatory response syndrome, aluminum-induced toxicity, and others.^{57,69,71–73} These effects were associated with modulation of key inflammatory parameters such as tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-1β, nuclear factor kappa B (NF-κB), and lipid peroxidation, alongside restoration of endogenous antioxidant defenses.^{25,57,67,69,71,72,74}

Phoenix dactylifera L. extracts have also been reported to enhance immune function. The high polyphenol content in Phoenix dactylifera L. has been shown to stimulate immune responses in broiler chickens, potentially through increased production of immune cells such as T and B lymphocytes.⁷⁵ Similarly, administration of the seed extract in male rats with carbon tetrachloride (CCl₄)-induced inflammation lowered TNF-α and increased glutathione levels, likely mediated by flavonoid constituents.⁷⁴ These findings collectively indicate consistent anti-inflammatory activity at the experimental level, predominantly mediated through antioxidant and immunomodulatory mechanisms.

Human evidence remains limited but emerging. Phoenix dactylifera L immunotherapy in allergic rhinitis patients resulted in clinical improvement, reduction in inflammation parameters, and markedly increased serum and nasal IL-10 following treatment.⁷⁶ Another study reported downregulation of pro-inflammatory mediators, including IL-1β, tumor growth factor (TGF)-β, COX-1, and COX-2, in middle-aged women following chronic consumption of date seed.⁷⁷ While these observations suggest potential immunomodulatory benefits, the current evidence base is dominated by preclinical studies, with substantial heterogeneity in extract composition, dosage, and study design. Consequently, well-controlled human trials using standardized preparations are required before Phoenix dactylifera L. can be considered a clinically validated anti-inflammatory intervention.

Anticancer and Chemopreventive Properties

Chronic inflammation and oxidative stress are well-recognized contributors to carcinogenesis, providing a strong rationale for investigating antioxidant-rich plant products as potential chemopreventive or adjunct anticancer agents. In this context, Phoenix dactylifera L. has been increasingly explored for its cytotoxic, antiproliferative, anti-angiogenic, and antimutagenic properties.

Date palm fruit has been associated with anti-inflammatory effects, which may delay cancer progression, potentially through anti-angiogenic mechanisms. Hence, the use of date-based herbal remedies is reported among breast cancer patients in certain regions, including Palestine.⁷⁸ Experimentally, parthenocarpic (seedless) Phoenix dactylifera L. aqueous-ethanolic extract demonstrated antiproliferative and anti-inflammatory activities against human breast cancer cell lines (MDA-MB-231 and MCF-7).⁷⁹ Methanolic extracts from cultivars such as Ajwa, Siwi, and Sukkari have shown notable cytotoxic effects across multiple human carcinoma cell lines, with Siwi extract showing IC₅₀ (half-maximal inhibitory concentration) of 99 µg/mL against MDA‑MB‑231 cells, followed by the Sukkari extract (IC₅₀=119 µg/mL).⁸⁰

Mechanistically, seed extracts demonstrated pro-apoptotic effects via caspase-3 activation in MDA‑MB‑231 cells.⁸¹ Moreover, the seed, fruit, and leaf fractions have been shown to suppress pancreatic and prostate cancer cell proliferation, likely attributable to their polyphenolic and flavonoid constituents.^82,83, Date fruits were also found to attenuate oxidative damage and reduce inflammatory cytokine TNF-α and angiogenic markers, such as vascular endothelial growth factor (VEGF) and CD31,³³ suggesting potential interference with tumor-promoting inflammatory and angiogenic pathways. The methanolic leaf extracts from cultivars such as Deglet Noor, Barhee, and Khunezi, have also exhibited antiproliferative effects against U87 glioblastoma and MDA‑MB‑231 cells, along with significant inhibition of cell adhesion and migration, indicating potential anti-metastatic properties.⁸⁴

Beyond crude extracts, innovative formulations have been explored. Silver nanoparticles (AgNPs) synthesized from date seed extracts exhibited promising antiproliferative activity against lung cancer cell lines.⁸⁵ Additionally, date palm pollen suspension demonstrated anti-inflammatory effects in an atypical prostatic hypertrophy rat model, likely by the modulation of cytokine expression and/or upregulation of autocrine/paracrine receptors.⁶¹

The antimutagenic potential of Phoenix dactylifera L. has also been investigated. Gallic acid isolated from Ajwa date pit extract demonstrated significant antimutagenic activity against Salmonella typhimurium strains TA98 and TA100, reducing mutagenicity in both strains with minimal associated toxicity.³⁵ Date palm fruit aqueous extract has been shown to demonstrate strong antimutagenic activity against UV radiation and mitomycin C–induced mutagenesis, and further purification of a phenolic-rich bioactive compound exerted antimutagenic effects across all systems.³⁷ An in vivo murine studies have also shown anti-genotoxic effects of date seed extracts against chemically-induced DNA damage.⁸⁶

These findings suggest that Phoenix dactylifera L. extracts exhibit noteworthy cytotoxic, antiproliferative, anti-angiogenic and antimutagenic activities in experimental models, supporting its potential candidate for further translational investigations in cancer prevention and adjunctive therapy.

Anti-Arthritic Properties

Arthritis encompasses numerous heterogeneous musculoskeletal disorders, among which rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by progressive joint destruction, cartilage degradation, and persistent synovial inflammation.⁸⁷ Although numerous conventional treatments are available, long-term use is frequently associated with adverse effects, high cost, and incomplete remission,⁸⁸ thereby sustaining interest in adjunctive nutraceuticals and functional foods rich in antioxidants and polyphenols.

Several studies have highlighted the potential of P. dactylifera L. in alleviating inflammation and managing symptoms in RA.⁸⁹ A preclinical study demonstrated that orally administered date fruit extracts reduced paw edema inflammation and swelling triggered by an immune response.⁷³ Notably, inflammation biomarkers such as erythrocyte sedimentation rate (ESR) and fibrinogen also decreased, whereas antioxidant levels (vitamins C, E, A, and β-carotene) increased.⁷³ Subsequent studies reported improvements in biochemical parameters, food intake, and body weight in arthritic rats supplemented with date fruit-based functional foods.⁹⁰ The prepared functional foods were sensorially accepted, highlighting the potential of P. dactylifera L. as a dietary supplement.⁹¹

Additionally, a biosynthesized AgNPs derived from date seed extracts has been reported to exhibit anti-arthritic activity in experimental models.⁸⁶ In order to improve bioavailability and therapeutic delivery, a study developed a nanoemulsion formulation of Phoenix dactylifera L. seed extract, which demonstrated enhanced drug release and displayed potent in vitro antioxidant activity compared to conventional suspensions.¹⁷ While clinical trials are necessary to definitively confirm the therapeutic benefits of date palm interventions in patients, currently available evidence supports the anti-inflammatory and potential disease-modifying effects of P. dactylifera L., with improved delivery systems in experimental models of arthritis.

Neuroprotective Effects

A systematic review examining the clinical and preclinical literature on Phoenix dactylifera L. reported potential health-related benefits, including observations relevant to neurodegenerative disorders such as Alzheimer’s Disease (AD).⁹² The putative neuroprotective properties of Phoenix dactylifera L. are primarily attributed to its rich phytochemical content, including flavonoids, phenolic compounds, and other bioactive compounds, which have been extensively investigated in in vitro and in vivo models.^46,47,90,92 These compounds have been shown to exhibit antioxidant, anti-inflammatory, and neurotransmitter modulatory effects, which may contribute to the plant’s potential for treating neurodegenerative conditions.^69,92 To date, most evidence supporting neuroprotective effects is preclinical, and translation to clinical efficacy has not been established.

Alzheimer’s Disease (AD)

AD is a neurodegenerative disorder characterized by cognitive decline, memory impairment, and behavioral changes. Despite extensive research, effective disease-modifying therapies remain limited. In recent years, there has been a growing interest in natural products as potential neuroprotective agents, including Phoenix dactylifera L., particularly due to its antioxidant and anti-inflammatory properties.⁶⁹

Several preclinical studies have investigated the effects of Phoenix dactylifera L. in experimental models relevant to AD. In vivo animal studies have reported that date palm extracts were associated with improvements in memory performance, antioxidant enzyme activity, and preservation of neuronal morphology, particularly in the CA1 region of the hippocampus.^47,93 An in vivo study demonstrated that the administration of Phoenix dactylifera L. seed extract in rats elicited antioxidant responses, which restored memory and learning deficiencies induced by β-amyloid.⁴⁷

An in silico analysis demonstrated that flavonoids present in date palm extract may inhibit Aβ_1-40 amyloid formation, indicating potential anti-amyloidogenic activity.⁹⁰ Additionally, a study in streptozotocin-aluminum chloride-induced AD rats demonstrated that the date seed supplementation improved memory patterns and enhanced antioxidant enzyme and neurotransmitter levels in brain tissues.⁶⁹

Parkinson’s Disease (PD)

PD is a neurodegenerative disorder characterized by motor impairments including bradykinesia, resting tremor, rigidity, and postural instability, primarily resulting from dopaminergic neuron degeneration in the substantia nigra.⁴⁶ Although current therapies alleviate symptoms, they do not halt disease progression, prompting interest in neuroprotective strategies.

In a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mouse model to assess the neuroprotective properties of Phoenix dactylifera L., the administration of seed extract significantly alleviated memory impairment and exhibited anti-inflammatory effects.⁴⁷ Additionally, an in vitro study showed that phenolic compounds from the methanolic extract of Phoenix dactylifera L. possess antioxidant properties and may protect dopaminergic neurons against oxidative stress.⁴⁷ These effects are attributed to flavonoids and phenolic compounds known to modulate oxidative stress, inflammation, and neurotransmitter pathways.^46,47,92

Amyotrophic Lateral Sclerosis (ALS)

ALS is a fatal motor neuron disease characterized by progressive loss of upper and lower motor neurons, leading to muscle weakness, paralysis, and eventual respiratory failure.⁹⁴ Despite advances in understanding disease mechanisms, including oxidative stress, mitochondrial dysfunction, neuroinflammation, and glutamate-mediated excitotoxicity, effective disease-modifying treatments remain elusive.^94–96

Currently approved therapies for ALS provide only modest benefits in survival or symptom management and are frequently associated with adverse effects.^97–99 These limitations have driven interest in adjunctive or supportive approaches, including antioxidant-rich dietary and nutraceutical interventions such as Phoenix dactylifera L. Previous reviews have highlighted the broader potential of plant-derived compounds as adjunctive agents in ALS management,^100,101 however, data for Phoenix dactylifera L. remains confined to the preclinical level, with no clinical studies to date evaluating its efficacy or safety.

Glaucoma

Glaucoma is a major cause of blindness and is characterized by progressive degeneration of retinal ganglion cells (RGC) and their axons, which culminate in visual loss.^102,103 Current standard therapies primarily aim to lower intraocular pressure (IOP);¹⁰⁴ however, glaucoma progression may continue in certain patients despite IOP control,^102,103 highlighting the need for adjunctive neuroprotective strategies.

In this context, Phoenix dactylifera L. is an attractive candidate for glaucoma management because of its antioxidant and putative neuroprotective phytochemical profile, although no animal or comparative studies have examined its effects on glaucomatous neurodegeneration. In relevance to ocular conditions, a study by Khathija et al using a naphthalene-induced cataract model to assess antioxidant levels across different rat groups, suggests that β-sitosterol, the active phytoconstituent in Phoenix dactylifera L., may contribute to its anticataract effect through antioxidant activity.¹⁰⁵ Although untreated cataracts may lead to secondary ocular complications, including glaucoma and uveitis,¹⁰⁶ cataract models do not recapitulate the key pathological features of glaucoma, such as RGC loss and optic nerve damage. As such, these findings cannot be directly extrapolated to glaucomatous neurodegeneration and require substantial disease-specific exploration for consideration as an adjunctive nutraceutical or supportive intervention in glaucoma management.

Antiseizure and Anticonvulsant Properties

Epilepsy and seizure disorders are characterized by recurrent, unprovoked neuronal hyperexcitability, often associated with oxidative stress, neuroinflammation, and neurotransmitter imbalance.¹⁰⁷ Given the antioxidant and neuroprotective properties of Phoenix dactylifera L., its potential anticonvulsant effects have attracted increasing research interest in experimental models. A study documented the anticonvulsant effects of the primary component of date palm spathes, 3,4-dimethoxy toluene (DMT), which delayed the onset of seizures and death (by 50 to 100%) in chemically-induced epileptic models.¹⁰⁸ This finding is strongly supported by Hashmi et al; in a pentylenetetrazole (PTZ)-induced mouse model, hydroalcoholic Ajwa date extracts also delayed the onset of myoclonic and tonic-clonic seizures and reduced their duration with comparable effects to diazepam.¹⁰⁹ Mechanistically, hydroalcoholic date extract resulted in elevated gamma-aminobutyric acid (GABA) neurotransmitter levels and reduced lipid peroxidation in PTZ-induced seizure, suggesting neuroprotective modulation of inhibitory tone against seizures.¹¹⁰ However, an earlier study reported the lack of efficacy of methanolic date fruit extract in the maximal electroshock seizure (MES) model.¹¹¹ These mixed results underscore the need for standardized seizure models, dose optimization, and mechanistic clarification before anticonvulsant claims can be substantiated.

Antimicrobial, Antiviral and Antiparasitic Properties

Given the increasing global burden of infectious diseases and antimicrobial resistance, plant-derived bioactive compounds have gained attention as potential complementary antimicrobial agents. In this context, Phoenix dactylifera L. has been investigated for its antibacterial, antiviral, and antiparasitic activities. A review by Taleb et al reported multiple in vitro studies demonstrating the antibacterial activities of Phoenix dactylifera L. fruit extracts.³³

Ethanolic and methanolic extracts of Phoenix dactylifera L. date fruits and seeds have demonstrated broad-spectrum antimicrobial activities against both Gram-positive and Gram-negative bacteria.¹¹² Methanolic pulp extracts of the Ajwa cultivar exhibited strong antibacterial effects, with inhibition zones ranging from 27.7 mm to 34.0 mm against Escherichia coli, Salmonella typhi, Shigella flexneri, and Vibrio cholerae, outperforming aqueous extracts at equivalent concentrations, highlighting solvent-dependent extraction efficiency.¹¹² One study evaluated date extracts against six clinically relevant human pathogenic bacterial strains; Escherichia coli, Bacillus subtilis, and Staphylococcus aureus were highly sensitive to most extracts, whereas Streptococcus pyogenes and Shigella flexneri clinical isolates showed moderate sensitivity.³⁴ In addition, purified gallic acid isolated from date pits demonstrated inhibitory activity against both Gram-positive and Gram-negative bacteria. Notably, Staphylococcus aureus cell viability was completely inhibited following exposure to 200 µg/mL gallic acid for 6 hours.³⁵

Date-derived products, particularly seed oil and essential oil, were also shown to demonstrate notable antibacterial activity against both Gram-negative and Gram-positive bacteria. A study showed that date seed oil exerted strong activity against Gram-negative bacteria and Staphylococcus aureus, as evidenced by structural damage observed under microscopy.¹¹³ Similarly, date seed essential oil exhibited concentration-dependent antibacterial effects against clinically relevant pathogens such as Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae, with some activity comparable to conventional antibiotics against Gram-positive bacteria, although Pseudomonas aeruginosa showed resistance.¹¹⁴ Cultivar-specific studies further demonstrated that fresh fruit extracts, particularly from the Egyptian Hayany cultivar, possess strong antimicrobial activity correlated with high phenolic, flavonoid, and tannin content. Moreover, nanoformulation of Hayany fruit extract significantly enhanced antimicrobial efficacy, achieving rapid microbial eradication and highlighting the potential of formulation enhancements.¹¹⁵

Date palm extracts have shown promising antiviral potential in in vitro studies. Acetone extracts of date pits inhibited bacteriophage-induced lysis, with a minimum inhibitory concentration below 10 µg/mL, suggesting direct interaction with viral particles.¹¹⁶ Ajwa extract demonstrated antiviral activity against herpes simplex virus type 1 (HSV-1) in a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay (IC₅₀ = 113.99 ± 4.67 µg/mL), primarily by preventing viral attachment to host cells (IC₅₀ = 57.82 ± 1.37 µg/mL), although limited activity was observed against coxsackievirus B4 (CVB4).¹¹⁷ Date pit extract showed moderate antiviral activity with a CC₅₀ (half-maximal cytotoxic concentration) value of 123.0 µg/mL.¹¹⁸ Molecular docking analysis identified chlorogenic acid as a key contributor due to its strong binding affinity to viral glycoprotein D, suggesting inhibition of viral entry.¹¹⁷ Another in silico analysis revealed that phytochemicals such as apigenin, diosmetin, and luteolin exhibited strong predicted antiviral potential, with binding affinities surpassing those of reference antiviral drugs such as nirmatrelvir and ritonavir.¹¹⁹ Phytochemicals from Phoenix dactylifera also demonstrate strong in silico binding affinity to key dengue virus and Aedes aegypti protein targets, suggesting potential antiviral and vector-targeting activity.³⁷

Phoenix dactylifera L. date extract also demonstrated protective effects against coccidiosis-induced infection, evidenced by a significant reduction in parasitic stages within the intestinal villi of Eimeria papillate-infected mice following treatment.¹²⁰ Collectively, available evidence indicates that Phoenix dactylifera L. exhibits broad-spectrum antimicrobial, antiviral, and antiparasitic activities in experimental models, largely attributed to its phenolic and bioactive constituents. However, most findings are derived from in vitro, in silico, or animal studies with considerable variability in extract preparation, concentrations, and test systems. Therefore, standardized formulations, mechanistic validation, and well-designed clinical studies are required to substantiate its translational potential as an adjunct antimicrobial agent.

Cardiometabolic Effects

Cardiovascular disease remains a leading cause of global morbidity and mortality, with dyslipidemia, oxidative stress, endothelial dysfunction, and chronic inflammation recognized as key contributors to its pathogenesis. Given the rich polyphenolic composition of Phoenix dactylifera L., its potential cardiometabolic benefits have been increasingly investigated in experimental and limited clinical settings.

Consumption of date products or their polyphenol-rich fractions has been shown to favorably regulate lipid levels and vascular function.⁴⁹ Flavonoids present in dates are reported to exert antiatherogenic, antithrombotic, and antioxidant properties, thereby contributing to cardiovascular health.¹²¹ An in vivo study demonstrated that administration of date palm extract significantly reduced body and liver weights, as well as total hepatic cholesterol, LDL-C, VLDL-C, and triglycerides, with an increase in HDL-C levels and antioxidant enzyme activity.⁵⁰ These findings indicate a potential hypolipidemic effect, although extrapolation to humans requires further validation.

Mechanistically, in vitro studies have shown that freeze-dried extract from California-grown dates can act as a strong co-agonist ligand of the farnesoid X receptor (FXR), a nuclear receptor involved in cholesterol and triglyceride homeostasis.¹²² The extract contained approximately 13% proanthocyanidin content (PAC) (131.3 mg PACs/g dry weight of date palm extract).¹²² Additionally, high levels of flavonoids such as epicatechin and procyanidin B2 identified in date seeds^123,124 have been associated with enhanced nitric oxide bioavailability and reduced expression of glycoprotein IIB/IIIa, thereby potentially inhibiting platelet aggregation.¹²⁴ These mechanistic observations provide biological plausibility but remain largely confined to experimental models.

The hypocholesterolemic effects of Phoenix dactylifera L. have also been explored in both animal and human studies. Hypocholesterolemic and hypolipidemic refer to conditions, substances, or interventions that can reduce or lower lipid levels in the blood, particularly cholesterol and triglycerides.^125,126 An in vivo study showed that date seed extract significantly increased serum paraoxonase and arylesterase activities in hypercholesterolemic rats, despite no increase in total antioxidant capacity.¹²⁷ Another study conducted in an obese rat model demonstrated that the date palm fruit supplementation mitigated hypercholesterolemic-induced damage to the endometrium.¹²⁸

Collectively, current evidence suggests that Phoenix dactylifera L. exhibits lipid-modulatory and vascular-protective effects in experimental settings. The exhibited cardiometabolic properties support its potential incorporation into functional foods, polyphenol-enriched extracts, or nutraceutical formulations aimed at cardiovascular risk reduction.

Antidiabetic Properties

Type 2 diabetes mellitus (T2DM) is characterized by chronic hyperglycemia, insulin resistance, and progressive metabolic dysfunction. Severe hypoglycemia, particularly in intensively treated patients, may precipitate adverse cardiovascular consequences, including myocardial ischemia, cardiac arrhythmias, cardiac death, and ischemic brain injury.^129,130 Thus, dietary interventions that support glycemic stability without exacerbating cardiovascular risk are of considerable clinical interest.

Traditionally, dates have been consumed as part of a balanced diet and proposed to contribute antioxidant effects in individuals with metabolic disorders such as diabetes.²⁷ A human study reported that moderate date consumption in individuals with T2DM did not significantly alter HbA1c, as well as LDL-C, triglycerides, and BMI.¹³¹ Importantly, this suggests that low-to-moderate intake does not adversely affect glycemic control, supporting the safe inclusion of dates within balanced diets.

Preclinical studies demonstrate antidiabetic potential. Oral administration of Phoenix dactylifera L. seed extract in streptozotocin-induced diabetic rats significantly reduced blood glucose levels, with enhanced effects observed when combined with insulin therapy.¹³² The combination treatment also attenuated hepatic and renal toxicity, suggesting potential adjunctive benefits.¹³² Similarly, oral administration of an aqueous seed suspension in experimental rats significantly reduced blood glucose levels and mitigated diabetic nephrotoxicity and hepatotoxicity.¹³³

A study on the effects of a hydroalcoholic leaf extract (20 mg/kg) in an alloxan-induced type 2 diabetes mouse model demonstrated reduced postprandial plasma glucose levels, with effects comparable to or better than acarbose (50 mg/kg) assessed at different timepoints.¹³⁴ In a similar diabetic-induction model using rats, ethanolic leaf extracts (100–400 mg/kg) increased plasma insulin levels and significantly reduced blood glucose, as well as serum triacylglycerol and cholesterol levels.¹³⁵ From a translational perspective, these findings suggest that date seed or leaf extracts may hold potential as adjunct nutraceuticals or functional food ingredients targeting glycemic control and metabolic syndrome.

Gastrohepatic Protective Properties

Given the close interplay between metabolic health, gut microbiota, and liver function, the gastrointestinal and hepatoprotective properties of Phoenix dactylifera L. are particularly relevant. Date fruits are rich in dietary fiber and polyphenols, both of which have been shown to promote beneficial bacterial growth. In vitro studies demonstrated that date fruit extracts increased the growth of Bifidobacteria and enhanced short-chain fatty acids (SFCA) production.¹³⁶ It was suggested that daily consumption of dates may provide fermentable substrates for gut microbiota, thereby reducing toxic protein-derived metabolites.¹³⁶

When consumed, polyphenols, which are rich in Phoenix dactylifera L. are metabolized by the resident microbiota, directly influencing gut microbial composition.¹³⁷ This interaction may contribute to improved colonic epithelial health and modulation of bacterial enzymatic activities, potentially reducing genotoxic metabolites such as secondary bile acids, N-nitroso compounds, and ammonia.^136–139

The hepatoprotective effect of Phoenix dactylifera L. has also been demonstrated in a CCl₄-induced hepatotoxicity model. Nanoemulsion formulations of Phoenix dactylifera L. seed extracts significantly improved antioxidant enzyme levels and reduced inflammatory markers in a CCl₄-induced rat model of liver fibrosis. These treatments also restored liver function parameters toward near-normal levels compared with untreated groups.¹⁴⁰ Collectively, Phoenix dactylifera L. demonstrates gut-modulatory, and hepatoprotective effects in experimental settings, primarily mediated through antioxidant, anti-inflammatory, and microbiota-related mechanisms.

Study Limitations and Future Recommendations

It is critical to conduct comprehensive studies to thoroughly understand the mechanisms underlying the therapeutic benefits of Phoenix dactylifera L. While bioactive compounds and crude extracts have shown promising activity in preclinical settings, the current literature is constrained by heterogeneity in study design and extract characteristics, which limits comparability and clinical translation. Specifically, studies vary widely in cultivar selection, ripening stage, plant part (fruit, seed, leaf, pollen), extraction solvent and conditions, phytochemical standardization, administered dose, duration, and outcome measures. Such variability contributes to inconsistent effect sizes and prevents reliable dose-response inference. Although bioactive compounds have shown efficacy in various preclinical settings, further clinical trials are essential to evaluate their safety, optimal dosages, and potential side effects in humans. Studies should also focus on the toxicity profile of different extracts, as insufficient data on their adverse effects could hinder their integration into clinical practice.^141,142

Moreover, exploring the role of Phoenix dactylifera L. derivatives in cosmetic applications could offer substantial benefits, particularly in terms of skin health and anti-aging properties. The incorporation of date palm extracts into skincare formulations should be pursued, with an emphasis on their biological efficacy and safety profiles based on rigorous research.¹⁴³ There should be a concerted effort in the scientific community to leverage the nutritional value of date seeds and other byproducts of the date palm to enhance their utility not only in medicinal contexts but also in general health and nutrition, potentially reducing waste in food processing industries.⁴ Furthermore, ongoing investigations into its gastrointestinal and liver-protective benefits may reveal additional therapeutic applications, signifying a broader scope of medicinal uses of this ancient fruit. Accessible and sustainable sourcing of these compounds will facilitate research and applications across various fields.

Conclusion

Phoenix dactylifera L. represents a nutritionally rich and chemically diverse plant with substantial preclinical evidence supporting its antioxidant, anti-inflammatory, metabolic, and cellular defense mechanisms. Despite accumulating evidence from in vitro and animal studies demonstrating its biological activities, current clinical data remains limited. Its adjunctive or synergistic effects alongside conventional therapies remain speculative in the absence of well-designed clinical trials.

Due to the current limitations in existing studies, future research should prioritize the standardization and phytochemical profiling, systematic dose-response and toxicity studies, pharmacokinetic and bioavailability assessments, and well-designed clinical trials targeting clearly defined health outcomes. Addressing these priorities will be essential to determine whether Phoenix dactylifera L. can transition from a promising nutraceutical candidate to an evidence-based therapeutic agent or functional food.