Features:Best Collagen Types 1&3 supports hair, skin, nails, tendons, ligaments and bones; it also supports joint comfort, mobility and quality of life. Collagen is the major structural protein in connective tissue; it helps maintain youthful skin by enhancing the structure and volume. Best collagen types 1&3 contains pure collagen protein enzymatically hydrolyzed into low molecular weight peptides for optimal utilization by the body. Doctor's Best makes collagen types 1&3 is tablet, capsule and powder. Non-GMO and gluten free.