Gelatin is an essential building block for healthy hair, nails, skin and cartilage. Cartilage is a type of connective tissue composed of mucopolysaccharides (including chondroitin sulfate), protein substances, calcium, sulfur and collagen. Collagen is one of the proteins found in most connective tissues, including cartilage, bone and skin. Gelatin is a form of collagen commonly used in foods; and preliminary reports suggest that consuming gelatin can improve the structure and health of the hair and nails. 21st Century's Gelatin is a high-quality gelatin.