The benefits of using a collagen powder are vast - it helps protect the skin from aging and environmental damage, improves elasticity, makes your hair glossy and soft, and aids in healing cuts and stretch marks. In this article, we explore the health benefits of using a collagen powder as well as its price point. Collagen is the most abundant protein found in connective tissue. It helps support cell growth. Collagen absorbs water and makes it available for other components in the body to absorb, such as minerals.