Collagen is one of the most abundant proteins in the human body (1). When we have enough, it keeps our skin supple and elastic, while also keeping our joints strong. Unfortunately, collagen production begins to decline as we age (cue: sagging skin, wrinkles, joint pain, and other symptoms of aging). Not only that, but diets high in sugar, nutrient deficiencies, and too much sunbathing also help speed up collagen breakdown.