Biotin-8Biotin 8 contains 8 mg of biotin per capsule provides support for dry, brittle nails* helps support healthy blood sugar metabolism* supports healthy skin and hair* helps maintain healthy nerve function* Biotin is a water soluble B vitamin that can have a beneficial effect on a number of structures and functions in the body.* In a clinical trial, 45 patients with brittle fingernails received oral supplementation of 2. 5 mg biotin for 1. 5 7 months.