North Coats Naturals Boosted Bovine Collagen - Contains non-GMO hydrolyzed collagen peptides sustainably sourced from pasture-raised, grass fed cattle – free from antibiotics or added hormones. Each serving delivers 10 grams of hydrolyzed collagen plus added L-Tryptophan (an essential amino acid, missing in collagen), making Boosted Bovine Collagen a complete protein. Collagen is the most abundant protein in our bodies. Added L-Lysine, Glycine, Vitamin C and Biotin help further boost overall joint, hair, nail and skin collagen formation.