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Genetics · Answer

What is the COMT gene?

COMT breaks down dopamine and other catecholamines. Here's what the Val158Met variant is, what the 'warrior/worrier' idea means and its limits.
By Reviewed Updated 1 min read

Quick answer

What is the COMT gene?

COMT is a gene that makes catechol-O-methyltransferase, an enzyme that breaks down dopamine, adrenaline and noradrenaline, especially in the brain's prefrontal cortex. A common variant, Val158Met, changes how active the enzyme is. It's been linked to differences in stress response and working memory, but its effects are small and depend heavily on context.

At a glance

Key takeaways

  • COMT helps clear dopamine and other catecholamines.
  • The Val158Met variant changes enzyme activity: Met versions are slower.
  • The 'warrior vs worrier' model is a simplification with modest effects in studies.
  • Sleep, stress management and exercise matter far more than your COMT genotype.

COMT is one of the most talked-about genes in wellness genetics reports. Here's what it does and how much it really tells you.

What COMT does

The COMT gene provides instructions for making catechol-O-methyltransferase. According to MedlinePlus, this enzyme helps break down catecholamines — dopamine, adrenaline (epinephrine) and noradrenaline (norepinephrine). It's especially important in the prefrontal cortex, the brain region involved in planning, focus and working memory.

The Val158Met variant

A common variant swaps valine (Val) for methionine (Met) at position 158:

  • Val/Val: faster enzyme, lower prefrontal dopamine.
  • Met/Met: enzyme activity up to several times lower, higher prefrontal dopamine.
  • Val/Met: in between.

Warrior vs worrier

A 2006 review described a "warrior/worrier" model. Met carriers ("worriers") may have an advantage in memory and attention tasks but greater sensitivity to stress and pain. Val carriers ("warriors") may cope better under stress but perform slightly worse on some cognitive tasks in calm conditions.

It's a catchy framework, but effects in studies are small and inconsistent. Many genes, plus sleep, environment and experience, shape how you handle stress and focus.

How to use your COMT result

  • If you're a likely "worrier," stress-management routines and good sleep may be especially worth prioritizing.
  • If you're a likely "warrior," you might notice you need more stimulation to stay engaged.
  • Either way, the proven levers are the same — see our focus guide.

Explore other traits in our wellness genetics guide, and remember that genotype describes tendencies, not destiny.

People also ask

More questions people ask

What is a COMT 'worrier'?

A nickname for Met/Met carriers, who have slower COMT and higher prefrontal dopamine, linked in some studies to better working memory but more stress sensitivity.

What is a COMT 'warrior'?

A nickname for Val/Val carriers, whose faster enzyme may mean better performance under stress but slightly lower baseline working memory in some studies.

Should COMT change my supplements?

There's no strong evidence for genotype-guided supplements. Discuss any changes with a clinician.

Answers

More answers

Citations

Sources & references

  1. [1]COMT geneMedlinePlus Genetics, U.S. National Library of Medicine · Reference databaseView source : COMT gene (opens in a new tab)
  2. [2]Warriors versus worriers: the role of COMT gene variantsStein DJ, Newman TK, Savitz J, Ramesar R. CNS Spectrums, 2006 · ReviewView source : Warriors versus worriers: the role of COMT gene variants (opens in a new tab)

Study links open a PubMed search for the exact title, so they keep working even if a journal changes its URL.

Related guides

Go deeper

Genetics · GuideWellness Genetics: Using Your DNA to Personalize Healthy HabitsWellness genetics uses common genetic variants to personalize nutrition, fitness, sleep and stress habits. Learn the body systems covered, the limits, and a 5-step action plan.Genetics · GlossaryCOMT: definitionCOMT (catechol-O-methyltransferase) is an enzyme that uses methyl groups to break down catecholamines such as dopamine, adrenaline and noradrenaline, as well as catechol estrogens.Performance · GuideFocus: Science-Backed Ways to Sharpen Attention and ConcentrationImprove focus with deep-work blocks, single-tasking, sleep, movement, caffeine timing and distraction control. Plus what the evidence says about nootropics.Genetics · ComparisonAncestry DNA Tests vs. Wellness DNA Tests: Which One Answers Your Question?Ancestry tests trace heritage; wellness DNA tests focus on methylation, nutrients and lifestyle genes. Compare scope, reports, privacy and which to choose.Genetics · ArticleCaffeine and Your Genes: What CYP1A2 Can (and Can't) Tell YouWhy some people sleep after espresso and others are wired for hours: how the CYP1A2 gene shapes caffeine metabolism and how to time caffeine.Genetics · GuideDNA Testing Explained: Types of DNA Tests and What Each Can Tell YouUnderstand the main types of DNA tests — ancestry, wellness, carrier, diagnostic and pharmacogenomic — plus genotyping vs. sequencing, privacy and how to choose.

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