GST & GPX gene mutation
By Russell Browne (Dip. Adv. Nut.) · Specialist in Genetic Nutrition & Methylation Protocols
The GST and GPX changes people call “mutations” are common polymorphisms (variants) — including common deletions of GSTM1 or GSTT1. Here is what these genes do, what the research supports around detoxification and antioxidant defence, and what we observe in practice.
What is a GST & GPX gene mutation?
A GST & GPX “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 GST and GPX genes do
GST (glutathione S-transferase) genes and GPX (glutathione peroxidase) genes are part of the body’s Phase II detoxification and antioxidant systems, both of which use glutathione. GST enzymes help attach glutathione to certain compounds so they can be cleared; GPX enzymes help neutralise reactive oxygen species (oxidative stress). Some people carry common deletions (null variants) of GSTM1 or GSTT1.
New to all this? Start with the overview
Bad Genes – The Genetic Advantage by Russell Browne is a plain-English tour of the common gene variants that most influence health — the ideal companion to your variant report, and a great place to see how the individual genes fit together.
GST, GPX, and antioxidant defence
Because these enzymes support detoxification and antioxidant capacity, their variants have been studied for whether they are associated with differences in how the body handles oxidative stress and certain exposures. The evidence is relative and context-dependent, and no single gene determines “detox” capacity on its own.
GST & GPX 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
GST (including GSTM1/GSTT1 null) and GPX variants have been studied for associations with oxidative-stress markers and responses to certain environmental exposures, with modest and inconsistent findings.
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 antioxidant and detoxification support as part of a whole-person picture — not something to drive from a single genotype. We deliberately do not publish “detox protocols” based on these variants; appropriate support is individual and belongs with a practitioner. This is a clinical observation, considered case by case.
How to find your GST & GPX result
Your existing 23andMe or AncestryDNA raw data file already contains your GST & GPX markers — you do not need a new test. Uploading it produces a plain-language variant report showing your GST & GPX result (and many others), which you can then review with your practitioner in the context of your whole health picture.
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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 GST/GPX gene mutations or you want to prevent these conditions, the first thing to do is get your ancestry raw data and upload it to our app, this will show your GST/GPX genes and provide the status of the mutations.
Once you confirm if you have GST/GPX mutations the best thing you can do is work with a practitioner who understand epigenetics and nutrigenomics via a consultation here.