Want some extra help with your active, on-the-go lifestyle? Trimethylglycine, or TMG, also known as betaine, is an active metabolite of choline and is involved in several methylation processes in the body. Take two capsules from Swanson Health each morning to provide 1g of TMG and help support a well-balanced diet. Want some extra help with your active, on-the-go lifestyle? Trimethylglycine, or TMG, also known as betaine, an active metabolite of choline and is involved in several methylation processes in the body. Take two capsules from Swanson Health each morning to provide 1g of TMG and help support a well-balanced diet. Trimethylglycine, or TMG, also goes by the name betaine. 1g of TMG per 2 capsules. 90 capsules per pack Ultra TMG by Swanson Health contains 500mg of Trimethylglycine per capsule! TMG is obtained from betaine. Read more here!