Dimethylglycine (DMG) is a derivative of the amino acid glycine found in beans and liver. It can be formed from trimethylglycine upon the loss of one of its methyl groups. It is also a byproduct of the metabolism of choline. When DMG was first discovered, it was referred to as vitamin B16, but unlike true B vitamins, deficiency of DMG in the diet doesn't lead to any ill effects. In legal terms, it has been deemed not to be a vitamin but a food product and, as such, is available without a pract… (More on Dimethylglycine)