Craig McCloskey August 2, 2021 Autoimmune Disease, Nutrition Can Collagen Heal the Gut and Improve Autoimmune Disease? Craig McCloskey August 2, 2021 Autoimmune Disease, Nutrition Collagen across the board is super high in the amino acids that muscle meats commonly are not - glycine and proline. Including more collagen in your diet can have profound impacts on your health and athletic performance.