How much biotin should I take for nail growth? Biotin may help for brittle nails. Studies show that taking-5 mg (2500 mcg) tablets daily may lead to some improvement in nail firmness, hardness, and thickness. In one study, over half of the folks taking biotin-5 mg a day had a 25% increase in thickness of their nails.
How long does it take for biotin to work for nails? four to six months
How long does it take for biotin to work on hair and nails? But, for many people, it begins to work around the third or fourth month, and that’s when the results get encouraging. So, if you are looking to grow more hair quicker on biotin, you’ll need to devote at least three months to taking the medication without any expectations.