How long does it take biotin to work on hair? 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.
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.
What is the best way to take biotin? Take 30-100 micrograms of biotin per day. For example, if your supplement has 1,000 micrograms per pill, you may only want to take one per week. Most biotin supplements come in pill form; if you are using one of these, take it with water as you would any other pill. Biotin can also come in liquid form.