5 Things to Know About Keto Collagen Protein 1. Collagen is one of the most abundant proteins in the body and is important to be replenished since we are continually losing collagen as we age. 2. Collagen protein is responsible for strengthening your bones, joints, and ligaments. 3. Collagen protein can play a big role in improving our gut health by improving the lining of our digestive system. 4. Collagen protein can also contribute to improved skin health. 5. The minimum effective dose to see benefits from collagen is 10g.