Collagen Types 1&3 supports hair, skin, nails, tendons, ligaments and bones. It also supports joint comfort, mobility and quality of life. Non-GMO and Gluten Free What is Doctor’s Best Collagen Types 1&3? Collagen is the major structural protein in healthy joints. It can also help maintain youthful skin by enhancing the structure and volume of the skin. Doctor’s Best Collagen Types 1&3 contains pure collagen protein enzymatically hydrolyzed into component amino acids for optimal utilization by the body. How does it work? Type I collagen is the most abundant protein in the human body and the major protein found in skin providing it’s tensile strength and resiliency. Type 3 collagen is found at high levels in cardiovascular tissue in developing skin and is also a precursor for Type 1 collagen. Types 1&3 collagen are often found together in the same tissues because each form complements the structural integrity of the other. Collagen synthesis is a continuous process throughout life and is essential for growth and repair. Rejuvenation and renewal of every tissue throughout the body requires the production of newly synthesized collagen. However, this process can become less efficient as we age leading to decreased renewal of old tissue. As the skin ages, the levels of Types 1&3 collagen, as well as elastin, decrease in the dermis resulting in the loss of elasticity.