what gelatin is used in gnc products
1 Gelatin is a colorless, odorless soluble form of collagen. 2  Collagen is the protein material from which connective tissues such as scars, tendons, ligaments and the foundation of bones and teeth are made.3  778mg. or 12 grains of pure natural source gelatin. 4  Gelatin is an excellent source of amino acids. Collagen is the protein material from which connective tissues such as scars, tendons, ligaments and the foundation of bones and teeth are made. 2  778mg. or 12 grains of pure natural source gelatin. 3  Gelatin is an excellent source of amino acids.