References

Colombo VE, Gerber F, Bronhofer M, Floersheim GL. Treatment of brittle fingernails  and onychoschizia with biotin: scanning electron microscopy. J Am Acad Dermatol.  1990;23(6 Pt 1):1127-32. 

doi: 10.1016/0190-9622(90)70345-i. 

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Lipner SR, Scher RK. Biotin for the treatment of nail disease: what is the evidence? J  Dermatolog Treat. 2018;29(4):411-414. 

doi: 10.1080/09546634.2017.1395799.  

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National Institutes of Health. Office of Dietary Supplements. Biotin. Fact Sheet for Health Professionals. 2021. Accessed April 11, 2021.

https://ods.od.nih.gov/factsheets/Biotin-HealthProfessional/.