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Effects of Bacillus subtilis var. natto products on symptoms caused by blood flow disturbance in female patients with lifestyle diseases

Authors Hitosugi M, Hamada K, Misaka K

Received 29 October 2014

Accepted for publication 15 December 2014

Published 20 January 2015 Volume 2015:8 Pages 41—46

DOI https://doi.org/10.2147/IJGM.S76588

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Dr Scott Fraser


Masahito Hitosugi,1,2 Katsuo Hamada,2 Kazutaka Misaka2

1Department of Legal Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan; 2Department of Internal Medicine, Nagareyama Central Hospital, Nagareyama, Chiba, Japan

Abstract: The fermented soybean product natto is a popular traditional food in Japan and is considered a health supplement. NKCP®, a natto-derived dietary food supplement whose main component is bacillopeptidase F, has antithrombotic, fibrinolytic, and blood pressure-lowering effects. We examined whether daily intake of NKCP® effectively improves subjective symptoms in patients with lifestyle diseases in this cross-over, double-blind study. Fermented soya extract with subtilisin NAT (nattokinase) as the main component was used as an active placebo. A 4-week course of NKCP® significantly decreased the visual analog scale (VAS) score for shoulder stiffness from 42.3 to 32.4 (P=0.009), the VAS score for low back pain from 25.5 to 18.8 (P=0.02), and the VAS score for coldness of the extremities from 33.1 to 25.7 (P=0.002). However, no significant difference was found in the VAS score for headache. After a 4-week course of active placebo, no significant changes in the VAS score were found for any symptoms. The significant improvement in the symptoms secondary to blood flow disturbance was caused by the improvement in blood flow by NKCP®. The use of dietary supplements based on the Japanese traditional food natto helps to relieve subjective symptoms for patients with lifestyle diseases receiving medical care.

Keywords: bacillopeptidase F, Japanese traditional food, lifestyle disease, subjective symptom, supplement

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