TMG can support the formation of methionine by methylating homocysteine. Like DMG, TMG is considered a 'methyl donor' or “methyl bank.' The additional methyl group makes TMG a more active “methyl donor” than DMG, which provides a benefit to some individuals. The chemical structure of TMG is a glycine molecule holding onto three methyl groups. TMG is dimethylglycine (DMG) with one more methyl group. Kirkman’s TMG is derived from beets, which is the commercially available source. Kirkman® offers 175 mg Trimethylglycine (TMG) hypoallergenic capsules specially formulated for individuals with special requirements and sensitivities.