Is biotin shampoo bad ?
Biotin is safe. If you take more than you daily value (100%) the body will get rid of the excess when you urinate and animal studies have indicated few, if any, effects due to toxic doses of biotin. This may provide evidence that both animals and humans could tolerate doses of at least an order of magnitude greater than each of their nutritional requirements. There are no reported cases of adverse effects from receiving high doses of the vitamin. I’ve heard that Biotin in shampoo are not worth it since the scalp doesn’t absorbed it well but I never tried the shampoos. take Biotin tablets that carry 5000ug (5mg) from Nature’s Bounty. They even sell them in capsules that are easier to swallow. Getting 5,000ug per day equals 1,667% of daily value so that’s a LOT. I’ve been taking biotin for a couple of months and my hair grows pretty fast and healthy BUT not strong as I wanted so keep in mind that you will have to cut one inch of hair every two months if you want to keep the hair strong.