High-Dose Biotin Supplementation Exacerbates Chronic Migraine: A Case Report

Introduction

Chronic migraine is defined as a headache occurring on 15 or more days per month for more than 3 months, while migraine headache occurs on at least 8 days per month.¹ Migraine is a disabling primary headache disorder, often precipitated by known triggers including hormonal changes, stress, sleep irregularities, and dietary components.² The prevalence of migraine and chronic migraine is approximately 14–15% and 1.4–2.2% of the worldwide population, respectively, and it is found to be higher in women (1.7–4.0%) compared to men (0.6–0.7%).^3–5 It tremendously influences the patient’s quality of life and also significantly causes personal and socioeconomic burdens.⁵

Chronic migraine has frequently evolved from poorly managed episodic migraine pain. Chronic migraine treatments involve therapeutic challenges due to poor treatment response to pain. The optimal treatment strategies focus on modifying risk factors, identifying progression triggers, managing comorbidities, and utilizing acute, prophylactic, and non-pharmacological therapies that involve to prevent migraine attacks.^6,7 Chronic migraine patients who did not receive appropriate medication were at risk of medication overuse and non-pharmacological strategies associated with headache.⁸ Medication overuse is considered a critical factor that triggers the progression of migraine into chronic form. Sometimes medications lead to adverse events, including weight loss or gain, sweating, fatigue, nightmares, and gastrointestinal upset.⁸ Recently, nutritional approaches have emerged as promising strategies for managing migraines.⁹ For instance, Vitamin D is a nutritional supplement that has potential benefits in managing pain and treating migraine.⁹ A recent systematic review revealed that Vitamin B significantly reduced the frequency, duration, and severity of migraine.¹⁰ In addition, vitamin B₆, B₁₂, and folic acid are also helpful in reducing the severity of migraine.¹¹ Supplementation with other nutrients, like omega-3 fatty acids, riboflavin, alpha lipoic acid, probiotics, magnesium, and coenzyme Q10, can also have beneficial effects on the management of migraine attacks.¹² Several other novel treatment strategies, including cannabis-based modalities, hormonal and metabolic interventions, targeting the trigeminovascular system, which may prove to be an effective treatment for migraine.¹³ However, the use of supplements is rarely considered a migraine trigger.

Biotin (vitamin B7), a water-soluble B-complex vitamin, is increasingly used in the metabolism of macronutrients and at high doses for cosmetic benefits. In addition, biotin administration may be beneficial for various neurological disorders, such as multiple sclerosis.¹⁴ The dosage of biotin used for nutritional (5000–10000 mcg) and medicinal purposes (5–20 mg) is significantly different and increasingly linked to interference with assays and neurological defects.¹⁵ However, high-dose biotin supplementation may alter vascular reactivity, neuronal excitability, or inflammatory mediators and potentially exacerbate migraine severity. While generally regarded as safe, its neurological effects, especially in migraine-prone individuals, are underexplored. This case report illustrates a potential link between high doses of biotin and worsening of chronic migraine, as no previous case reports or studies have linked biotin to migraine exacerbation.

Case Description

A female patient with a long history of chronic classic migraine presented with a two-month history of daily severe headaches. Her prior migraine pattern consisted of infrequent attacks (~once every 2 months), with moderate throbbing pain rated 7/10, right-sided, and associated with visual aura, nausea, vomiting, photophobia, and phonophobia. These symptoms were consistently responsive to sumatriptan.

Patient was well controlled for over 10 years on amitriptyline 50 mg nightly and topiramate 50 mg twice daily (Table 1). Prior attempts to taper these medications led to increased frequency of attacks, so she continued this regimen. Her known migraine triggers included sleep disturbances and chocolate, both of which were meticulously avoided.

Table 1 Clinical and Treatment Summary of a Patient with Chronic Migraine

Two months before symptom escalation, she began taking high-dose biotin (10,000 mcg) once daily for 3 months as a nutritional supplement, a dosage substantially higher than typical non-prescription formulations, and it is common in over-counter sales. After taking the supplement, a progressive increase was observed in migraine attack frequency and intensity during the first week (daily attacks), with episodes of baseline pattern to more frequent and severe headaches. Meanwhile, confounding factors, such as sleep pattern, menstrual timing, caffeine intake, stress level, and use of other sedative medications, were also evaluated, and no significant changes were reported during the use of biotin. Overall, the headache pattern worsened dramatically, and she experienced daily attacks rated 9/10 in severity, interfering with daily activities and resulting in multiple emergency room (ER) visits. The headaches no longer responded to sumatriptan.

A detailed review of her lifestyle revealed no changes in diet, sleep, work, or medication except for the addition of a new biotin supplement. Additionally, no new stressors, infections, or environmental exposures were identified. The patient’s neurological examination was normal. The temporal correlation raised suspicion for biotin-induced worsening. Thus, biotin was discontinued and there was no change in prophylactic medication. Within one week, the frequency and severity of headaches began to improve. After three weeks, she has returned to her baseline, with rare, mild attacks. She did not resume biotin, and follow-up over the next three months showed sustained improvement.

Discussion

This is the first known case describing a temporal and reversible association between high-dose biotin supplementation and migraine exacerbation, as a literature search from different databases indicated no published studies linking biotin with chronic migraine exacerbation. Due to a high-dose biotin supplement, frequent migraine attacks occurred, and upon discontinuation, improvement in migraine was observed. The patient’s stable headache control for over a decade, absence of new lifestyle triggers, and marked improvement after biotin cessation suggest a potential causal relationship.

Chronic migraine is the most disabling condition of migraine, resulting in reduced quality of life and higher impairment in family functions.¹⁶ It is a disorder of neuronal excitability and sensory processing, involving mechanisms such as cortical spreading depression, neurotransmitter imbalance, and neurovascular dysregulation.¹⁷ Nutrients and supplements can modulate these pathways; for instance, riboflavin, magnesium, Vitamin D, Vitamin B₁₂, and coenzyme Q10 have shown prophylactic and therapeutic effects.^12,18,19 In contrast, the role of biotin (vitamin B7) in migraine pathophysiology has not been investigated in experimental and randomized controlled clinical studies. Biotin is a water-soluble B-complex vitamin that acts as a coenzyme for carboxylase enzymes involved in fatty acid synthesis, amino acid catabolism, and gluconeogenesis.²⁰ It is generally considered safe, even at supraphysiologic doses, emerging data suggest that high-dose biotin can interfere with diagnostic assays²¹ and may exert broader physiological effects.²²

In our clinical case study, a female patient showed worsening of migraine symptoms after overdosing on biotin. Potential mechanisms for biotin-induced migraine worsening in this patient (eg, neuronal hyperexcitability, metabolic shifts, immunological or neurovascular modulation).

Although speculative, potential mechanisms include interfering with neurotransmitter regulation or mitochondrial metabolism, thereby affecting brain energy production and potentially lowering the threshold for cortical spreading depression, and the electrophysiological correlate of migraine aura.^12,17 Biotin’s involvement in gluconeogenesis and fatty acid metabolism might alter cerebral energy homeostasis in susceptible individuals.^12,20 High-dose biotin has been studied in progressive multiple sclerosis for potential remyelinating effects, suggesting CNS-level activity.¹⁴ Interaction with other B-vitamins or competition at absorption sites (eg, with pantothenic acid) could create imbalances indirectly affecting neural function.²³ Moreover, it also had adverse interference with certain laboratory assays, including immunoassays that use biotin-streptavidin binding, which can result in misleading outcomes in tests, like thyroid function test.^24,25 Meanwhile, this type of interference is primarily a diagnostic concern, while in the case of migraine, it can indirectly affect migraine pathogenesis.

Over-the-counter supplement use is often underreported as a contributor to symptom exacerbation.²⁶ This case underscores the importance of a detailed medication and supplement history in patients with sudden changes in migraine pattern. Interestingly, population-based studies describe new-onset or worsening headaches in users of biotin supplements.^27,28 While such data lack scientific rigor, they echo this patient’s experience and warrant further investigation to elucidate the exact mechanism of worsening migraine.

Conclusion

This case suggests a possible link between high-dose biotin and worsening of migraine symptoms. The patient had stable migraines for years, then developed daily severe headaches shortly after starting biotin, with improvement after stopping it. This pattern makes biotin a likely contributor, but not a confirmed cause. It is important to distinguish between an observed association and proven causation. Other factors could have played a role, even if none were identified. It is recommended that clinicians should inquire about the use of supplements in chronic migraine cases. Studies are required to reveal the exact mechanism of worsening migraines using high-dose biotin.