TMG
methyl donor

Specialty Navigator

TMG: Methylation & Homocysteine Pathway Support

A quick customer guide to what TMG is, how it relates to methylation, common forms and the safety basics to check before choosing a product.

Need the quick version before choosing?

Use this profile to understand the basics first, then follow the shop or deeper-read links when needed.

This TMG profile is built as a quick stop inside the Specialty Supplements section. It keeps the customer-facing essentials clear without turning into a full article.
At a Glance
  • Provides methyl groups for selected biochemical pathways.
  • Often discussed alongside folate, B12 and B6.
  • Betaine pathways are involved in liver and methylation metabolism.
  • TMG is not a vitamin or mineral; form, dose, medicines and health context matter.

Written by GhamaHealth Editorial Team | Reviewed: 19 June 2026


TMG, also known as trimethylglycine or betaine, is a methyl donor discussed in relation to methylation and homocysteine metabolism pathways.

Support

What TMG does

TMG is best understood through its role in functional nutrition pathways. It is not a vitamin, mineral or herb, and should not be treated like a casual daily essential.

Methyl donation

Provides methyl groups for selected biochemical pathways.

Homocysteine context

Often discussed alongside folate, B12 and B6.

Liver metabolism

Betaine pathways are involved in liver and methylation metabolism.

Context

Food sources and body context

Some specialty compounds are produced in the body, some occur in small food amounts, and some are mainly used as targeted supplement ingredients.

Beetroot

Betaine was first identified from beet sources.

Spinach and grains

Spinach, quinoa and whole grains can contribute.

Supplement products

TMG products provide targeted amounts.

Forms

Common forms and label language

Product labels can vary widely. Check the exact form, amount per serve, directions, warnings and whether the compound appears in a broader formula.

TMG / betaine

Common supplement name.

Betaine anhydrous

Often used in capsules or powders.

Methylation blends

May be paired with folate, B12 and B6.

Performance formulas

Sometimes included in sports nutrition products.

Safety

When to be careful

Specialty supplements are more targeted than general nutrients. Suitability depends on product form, dose, medicines, health conditions, pregnancy status and professional advice.

B vitamin context

TMG is not the same as folate, B12 or B6.

Cholesterol context

Seek advice if monitoring cholesterol or cardiovascular risk.

Methylation sensitivity

Start carefully if sensitive to methyl donors or complex formulas.




A final note

Important Information

Disclaimer

This TMG profile provides general educational information only and does not replace personalised medical advice, diagnosis or treatment. Supplements should not replace medical care, prescribed treatment or personalised dietary advice.

Speak with a qualified healthcare professional before using TMG supplements if you are pregnant, breastfeeding, taking medication, managing a diagnosed condition, using multiple supplements, buying for children or unsure whether a product is suitable.

Always read the label, follow the directions for use and review warnings before use. Stop use and seek medical advice if unexpected symptoms occur, or if symptoms persist, worsen or change unexpectedly.

For our full Health Disclaimer & Liability Notice, please visit: Health Disclaimer.

References
  1. PubChem. Betaine compound summary. Retrieved 19 June 2026. View source.
  2. NIH Office of Dietary Supplements. Choline Fact Sheet. Retrieved 19 June 2026. View source.