Glycine itself is most abundant in skin and bones.
Thus, while many people may improve their digestion and other symptoms by removing wheat and beans, the fact that they may consider these foods "evil" does not automatically deliver them from the need to make up these nutrients from some other source. Muscle meats will always increase the need for glycine from skin and bones, but this effect could be greatly exaggerated if one eliminates legumes (and fortified bread?) without also increasing one's intake of organ meats and green vegetables.
