Does NMN interact with TMG?

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Take together· emerging evidence

TMG replaces methyl groups NMN uses up.

When the body clears the extra NAD+ that NMN produces, it attaches and uses up methyl groups, and the theory is that heavy NMN use could draw down the body's methyl supply; TMG (betaine) is a methyl donor that replaces them, which may prevent a shortfall.

What to do

Many people pair NMN with around 1 g of TMG daily as low-risk insurance, though whether the methyl drain is clinically meaningful in humans is unproven. It is a sensible, well-tolerated combination, and B-vitamins like folate and B12 support the same methylation system.

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Common questions

Can I take NMN and TMG together?
Take together. Many people pair NMN with around 1 g of TMG daily as low-risk insurance, though whether the methyl drain is clinically meaningful in humans is unproven. It is a sensible, well-tolerated combination, and B-vitamins like folate and B12 support the same methylation system.
Why do NMN and TMG interact?
When the body clears the extra NAD+ that NMN produces, it attaches and uses up methyl groups, and the theory is that heavy NMN use could draw down the body's methyl supply; TMG (betaine) is a methyl donor that replaces them, which may prevent a shortfall.

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Educational use only, not medical advice. Interaction risk depends on dose, your health, and any medications. Always consult a qualified clinician, especially if you take prescription drugs or are pregnant or nursing.