Doctors Best Collagen Types 1 3 1000mg provides the amino acids that are building blocks to support the growth, maintenance and integrity of collagen-rich tissues. Collagen Types 1 3 1000mg contains pure collagen protein which is enzymatically hydrolyzed for optimal utilization by the body. Collagen is the major structural protein in connective tissue and the most abundant protein in the human body. Type 1 3 collagens are often found together in the same tissue as each form complements the structural integrity of the other. Collagen may aid youthful skin by supporting the structure and volume of the skin. It is also responsible for supporting the strength and flexibility of bones, joints, skin, tendons, ligaments, hair, nails, blood vessels and eyes, among other tissues throughout the body. Type I collagen is the major protein found in skin providing support for tensile strength and resilience. Type 3 collagen can be found in cardiovascular tissue and also in newly developing skin. Collagen synthesis is a continuous process throughout life. Collagen is essential for growth and repair. Renewal and rejuvenation of every tissue in the body requires the production of newly synthesized collagen. However, as we age, this process needs extra support to maintain healthy tissue. As the skin ages, the levels of Types 1&3 collagen, as well as elastin, decrease, so collagen supports the maintenance of elasticity.