Natural Factors Total Body Marine Collagen with Hyaluronic Acid, Glutamine & Biotin - Features clinically studied Collactive hydrolyzed collagen and elastin with a synergistic combination of nutrients that promote healthy skin, muscles, and connective tissue. Collactive is a 100% marine-based natural ingredient composed of marine collagen and elastin peptides in the same ratio found naturally in human skin. It is formulated specifically for hydration and anti-aging support in the skin dermal layer, and has been shown to reduce the number of wrinkles, including deep wrinkles, within 28 days. Collactive contains hydrolyzed forms of collagen and elastin that are easily absorbed by the body, where they stimulate collagen synthesis and help reduce joint pain associated with osteoarthritis. Collagen and hyaluronic acid work together to provide structure, strength, and resilience in the body’s tissues, and are vital for maintaining hydration in the joints. This formula contains the amino acid L-tryptophan to make it a complete protein with a full spectrum of amino acids and L-glutamine to support protein synthesis and muscle recovery.