Trimethylglycine (TMG) was discovered to be beneficial to heart health back in the 1950s. It is a "methyl donor," providing extra methyl groups to hasten the conversion of homocysteine back to methionine. Research showing TMG’s ability to promote healthy levels of homocysteine, alone or in conjunction with other nutrients, confirms its status as an important nutrient for cardiovascular health. TMG from Life Extension delivers 1000 mg in each serving to support healthy homocysteine levels.