How much biotin should you take for hair growth? 2-5 milligrams
Can biotin grow hair back? The bottom line. There’s no strong evidence to support using biotin for hair growth or to prevent hair loss in people without a deficiency. Because hair thinning and poor hair growth are sometimes associated with a biotin deficiency, correcting a deficiency can help restore hair growth in some people.
How long do you have to take biotin to see hair growth? about three to four months