Youtheory Marine Collagen Enhanced Formula, Type 1 & 3 with 18 Amino Acid, 290 Tablets, Nutrawise CorporationYoutheory Marine Collagen Enhanced Formula Collagen Type 1 & 3 with 18 Amino Acid. Beauty inside & out. Amino acids. Added joint formula. Maximum absorption. Stronger hair & nails. Great for ligaments and tendons. Collagen is our body's key structural protein involved in creating strong and healthy nails, hair, tendons, bones, muscle, and keeping our skin smooth. During our youth collagen helps minimize wrinkles from forming, gives skin elasticity,