Does biotin speed up hair growth? Biotin, also known as vitamin B7, stimulates keratin production in hair and can increase the rate of follicle growth.
How long does it take your hair to grow with biotin? It takes months to see results on biotin. According to The Journal of Clinical and Aesthetic Dermatology (source), biotin takes around 90 days to begin to work. Contrary to some of the claims you may have heard, biotin is not an overnight remedy that will magically give you 5 inches of hair growth in 24 hours.