RejuviCare Hair Skin and Nails Capsules Description Hair Skin & Nails is an inner beauty formula that is scientifically developed to support thicker fuller hair; younger-looking skin; and stronger healthier nails. It contains a potent proprietary blend of essential vitamins and minerals including collagen and 5000 mcg of Biotin. 30 capsules help hydrate your hair revitalize your skin and nourish your nails. 30 capsules.