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 Full article: The central role of glutathione in the pathophysiology of human diseases NAC and Glycine: The Efficient Way to Raise Glutathione NAC + Glycine Powder Solutions 4 Health Yes glycine can be a surprisingly inexpensive, effective alternative to many overpriced collagen powders, but with some important nuances. Here's a clear breakdown of what glycine is, how it compares to