Methyl Donor
Betaine
Also known as: Trimethylglycine
A compound that supports the body's cell-maintenance chemistry, with knock-on benefits for brain health.
KÖGN Health grades Betaine as B (Moderate evidence) and rates it 3.6 out of 5.
Last reviewed · June 2026
Primary effects
- Improved cellular function
- Cognitive support
- Metabolic efficiency
How it works
Supports methylation and cellular hydration, indirectly influencing brain function and energy balance.
Overview
Betaine plays a key role in methylation, a process essential for DNA expression, neurotransmitter synthesis, and overall cellular health. While it is more commonly associated with physical performance and liver function, its indirect effects on brain health make it relevant in cognitive optimisation. It does not produce immediate nootropic effects but contributes to long-term neurological efficiency and resilience.
The evidence
Betaine (trimethylglycine) is a methyl donor whose established role is lowering homocysteine, a marker linked to vascular and cognitive health. The leap from that to actual cognitive benefit is not well supported by human trials; its strongest uses are metabolic and athletic rather than nootropic. Treat any brain benefit as indirect and unproven.
How to dose it
Homocysteine and performance studies use roughly 1–3 g/day (sometimes higher under supervision for specific conditions).
When to take it
Chronic.
Safety & side effects
Generally well tolerated; GI upset and a fishy body odour can occur at higher doses.
Who should avoid it
High-dose betaine can raise LDL ('bad') cholesterol — relevant if you have cardiovascular risk. Discuss with a clinician if you have kidney disease or are pregnant. The cognitive case is theoretical.
References
Related ingredients
Graded entries that target the same cognitive goals.
Categories
Draft — the dose, safety and evidence notes on this entry were prepared from the published literature and are pending editorial and clinical review.
Educational information, not medical advice. The evidence grade is KÖGN’s editorial assessment of published research, not a health claim. Speak to a qualified clinician before changing what you take.