VitaDay Biotin (vitamin B7) is an essential nutrient that helps promote healthy hair, skin, and nails. Biotin also acts as a coenzyme in numerous metabolic processes, including the breakdown of carbohydrates, fats, and protein for energy. Weak, dry, brittle nails are a fairly common condition. Research shows as many as one in five are affected by brittle nails, which can be unsightly, painful, and interfere with work activities and daily tasks. Biotin, is an essential water-soluble B vitamin. It has been shown to support healthy, strong nails and hair, and supplementation can also relieve some dry skin conditions. VitaDay provides biotin in 1000 and 5000 mcg vegetarian capsules to support beauty from within.