Collagen is the most abundant protein in the body. It's found in skin, hair, nails, tendons, ligaments, cartilage and bones. It helps maintain our skin's elasticity and volume. It's a structural protein, so it gives strength and integrity to our tissues and keeps joints strong, among other things. But starting in our 20s, the amount and quality of the collagen our bodies produce declines. Follow the link below to read more  

https://www.npr.org/2025/10/20/nx-s1-5560956/collagen-supplements-skin-joints