Our ancestors ate whole animals. Skin, cartilage, tendons, bones, organs. That meant they consumed massive amounts of glycine from collagen rich tissues. Modern humans eat almost exclusively muscle meat, which is extremely high Glutathione for Type 2 Diabetes: How It Restores Immunity New research from a Jamaican has yielded promising results for more effective treatment and management options for patients suffering from type 2 diabetes. The study, titled 'Combined Supplementation of S Nitro Glutathione and PDF) Glutathione Synthesis Is Diminished in Patients With Uncontrolled Diabetes and Restored by Dietary Supplementation With Cysteine and Glycine