BHMT gene mutation
By Russell Browne (Dip. Adv. Nut.) · Specialist in Genetic Nutrition & Methylation Protocols
The BHMT changes people call a “mutation” are common polymorphisms (variants), not rare defects. This page explains what the BHMT gene does, what the research supports around homocysteine, and what we observe in clinical practice.
What is a BHMT gene mutation?
A BHMT “mutation” — more accurately a common gene polymorphism or variant — is a widespread variation that can influence how this gene and its enzyme work. These are common variants that shift relative likelihoods, not switches that determine your health.
What the BHMT gene does
BHMT provides instructions for betaine-homocysteine methyltransferase, an enzyme that offers an alternative route for recycling the amino acid homocysteine back into methionine, using betaine (also known as TMG). It works alongside the folate/B12 route that involves MTHFR and MTR.
BHMT, betaine and homocysteine
Because BHMT provides a “backup” pathway for managing homocysteine using betaine and choline, its variants are discussed in relation to homocysteine and choline/betaine metabolism. Any effect from a common variant is modest and interacts with diet and other genes.
Want to go deeper on homocysteine?
Homocysteine – The Genetic Advantage by Russell Browne is a plain-English guide to what homocysteine is, how the methylation genes influence it, and why a blood test tells you more than a gene alone — the ideal companion to your variant report.
BHMT Variants: What the Research Shows, and What We See in Practice
There is a lot written about these genes online, and much of it overstates the case. We separate two kinds of information: what the published research has found, and — kept distinct from it — the patterns we have observed in clinical practice.
What the research shows
BHMT variants have been studied for associations with homocysteine levels and choline/betaine metabolism, sometimes only in combination with other variants or dietary factors, with modest findings. Reference.
Three things are essential to keep in view about this research:
- These variants are common — a large share of the population carries them.
- The findings are associations — relative shifts in likelihood across groups — not causation. A variant does not, by itself, cause any condition.
- Many people who carry these variants experience none of the associated patterns. Genes are one influence among many.
What we observe in clinical practice
In practice we consider betaine/choline status and this alternative pathway for some patients when looking at homocysteine as a whole — always alongside actual bloodwork, and never as a supplement protocol driven by a genotype. Homocysteine is measured with a blood test, and any related steps belong with your practitioner. These are clinical observations, considered case by case.
How to find your BHMT result
Your existing 23andMe or AncestryDNA raw data file already contains your BHMT markers — you do not need a new test. Uploading it produces a plain-language variant report showing your BHMT result (and many others), which you can then review with your practitioner in the context of your whole health picture.
Order or view your report · Find a practitioner
Important note
This page is educational and is not a diagnosis or a treatment plan. These variants are common and shift relative likelihood, not certainty; many people who carry them experience none of the patterns described here. The clinical observations reflect what we have seen in practice and will not apply to everyone. Anything you wish to act on should be assessed individually with a qualified practitioner who can consider your full history, symptoms, and any relevant testing.
About the Author
Russell Browne (Dip. Adv. Nut.)
Specialist in Genetic Nutrition & Methylation Protocols
Russell Browne is a qualified practitioner of Advanced Nutrition, Advanced Herbalism, and Homeopathy, with a specialized clinical focus on genetic nutrition, methylation pathways, and detoxification. With years of dedicated clinical experience helping patients decode complex chronic health issues, Russell is also the author of How to Treat Your MTHFR Gene Mutations the Right Way – The Genetic Advantage and several works on genetic wellness. He is committed to bridging the gap between complex genetic data and practical, root-cause clinical care.
Read Russell’s Full Professional Profile & Clinical Credentials
View Published Genetic Health Literature & Books
If you suspect you may have symptoms related to the BHMT gene mutations, the first thing to do is get your ancestry raw data and upload it to our app, this will show your BHMT genes and provide the status of the mutations.
Once you confirm if you have BHMT mutations the best thing you can do is work with a practitioner who understand epigenetics and nutrigenomics via a consultation here.
