Betaine (TMG)
Betaine and TMG are the same
- Type
- Methyl donor
- Typical amount
- Studies use roughly 1.5–2.5 grams per day for performance, less for methylation support.
- Best taken
- As directed on the formula label
- Caffeine
- None
- Main source
- It is found in beets, spinach, whole grains and seafood.
- Evidence level
- Limited / emerging
Betaine, also called trimethylglycine (TMG), is a compound derived from the amino acid glycine, originally identified in sugar beets.
What is Betaine (TMG)?
Betaine, also called trimethylglycine (TMG), is a compound derived from the amino acid glycine, originally identified in sugar beets.
How Betaine (TMG) works in the body
It acts as a methyl donor supporting liver function and homocysteine balance, and is studied for exercise performance. In practical terms, this is the mechanism weight-loss formulas are counting on when they include betaine (tmg).
What the research says about Betaine (TMG) and weight
Human research on Betaine (TMG) specifically for weight is limited or early-stage. Much of the rationale comes from traditional use, lab studies, or its general nutritional role. That doesn’t mean it doesn’t help — only that strong clinical proof for a weight effect isn’t established yet.
How much Betaine (TMG) to take
Studies use roughly 1.5–2.5 grams per day for performance, less for methylation support. Always check the label of your specific formula — blends often contain less betaine (tmg) than studies use, especially inside proprietary blends that don’t disclose exact amounts.
Food sources and supplement forms
It is found in beets, spinach, whole grains and seafood.
Why Betaine (TMG) appears in weight-loss formulas
It appears in liver and performance formulas for its methylation and exercise research.
Safety, side effects and interactions
Generally well tolerated; high doses may cause digestive upset or a fishy odour. As with any supplement, if you are pregnant, breastfeeding, taking medication or managing a health condition, check with your doctor first.
How to choose a quality Betaine (TMG) supplement
When choosing a Betaine (TMG) product or a formula containing it, look for one that discloses the actual amount of betaine (tmg) (not just a proprietary-blend total), uses a recognizable form, and is made by a brand with third-party testing or GMP manufacturing. More isn’t always better — match the dose to what research and the label suggest, and be wary of products that hide quantities behind a blend.
Betaine and TMG are the same
“Betaine” and “TMG” (trimethylglycine) are two names for one compound — first isolated from sugar beets, hence the name.
Common questions about Betaine (TMG)
What does Betaine (TMG) do for weight loss?
How much Betaine (TMG) should I take?
Is Betaine (TMG) safe?
How strong is the evidence for Betaine (TMG)?
Will Betaine (TMG) alone make me lose weight?
Does the dose in supplements match research?
Supplements with Betaine (TMG)
Formulas in the SourceLean directory that list Betaine (TMG) or a closely related form among their ingredients:
Related ingredients
Explore other compounds commonly found in weight-loss formulas:
Ingredient insights, explained
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