Doctor’s Best Collagen Types 1&3 helps support hair, skin, nails, tendons, ligaments and bones. It also helps support joint comfort, mobility and quality of life. Collagen is the major structural protein in the body’s 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. Doctor’s Best makes Collagen Types 1&3 in tablet, capsules and powder.