What is Collagen and Why Does It Matter for Skin Health? Collagen is the body’s most prevalent protein, constituting approximately 75% of skin. Collagen has been called the “glue that holds everything together” due to its large presence in the body. Collagen is essential in skincare for firmness, hydration, and elasticity purposes.As we get older—particularly after age 25—our body slows down its collagen production. This leads to dryness, sagging skin, fine lines, and a general loss in skin vitality. Environmental stressors such as sun exposure, air pollution, and poor diet can hasten this process.Over the last several years, collagen has become incredibly popular thanks to its capacity for refilling stores…