BLACKMORES Nails Hair And Skin (60 Tablet Size) is a comprehensive formula that provides essential nutrients for strong nails, healthy hair and skin. It contains a clinically trialled dose of biotin that has been shown to improve nail strength in 12 weeks. Features and benefits: Improvements after 12 weeks. Strengthens soft or brittle nails, reduces splitting and chipping, and increases nail thickness It may increase nail thickness by 25% and reduce splitting and chipping. Formulated to contain a range of nutrients that contribute to the health of nails, hair, and skin and assist with bone and collagen formation. Horsetail is a plant source of silica. Silica is concentrated in all connective tissue including nails, hair and skin, where it contributes to collagen formation. Collagen serves as the structural framework for skin. Zinc helps maintain the structural integrity of the nails, hair and skin. Vitamin C is important in the production of collagen. Adults should take 1 tablet twice a day with meals, or as professionally prescribed. Children under 12 years should take only as professionally prescribed.