Collagen: Boost Your Health and Beauty with Collagen in 2025 Collagen is a type of protein. In fact, it’s the most abundant structural protein in animals. A structural protein is one that makes up the structure or framework of your cells and tissues (1Trusted Source). 1. Is Collagen the Fountain of Youth?  Not quite, but … Continue reading Collagen: Boost Your Health and Beauty with Collagen in 2025