The Most Common COMT Pattern I See In Autism

I review hundreds of genetic reports each week, and one of the most consistent patterns I see in autistic clients is reduced COMT activity.

Most often this shows up at COMT rs4680 with AG or AA genotypes, most commonly called slow COMT.

COMT is responsible for clearing dopamine, norepinephrine, and epinephrine. When it runs slower, these neurotransmitters stay active longer.
This changes how the brain processes stimulation, stress, and input.

What I see in these profiles is not a behavioral issue. It is a clearance issue.

When COMT activity is reduced, I commonly see:
✔︎Heightened sensitivity to noise, light, and environment
✔︎Emotional intensity or prolonged reactions
✔︎Difficulty winding down or falling asleep
✔︎Periods of hyperfocus followed by fatigue
✔︎Increased stress reactivity

This pattern becomes more pronounced when it overlaps with other pathways.

In many of these same reports, I also see:
✔︎Methylation SNPs increasing demand on the system
✔︎Oxidative stress variants raising neuronal load
✔︎Histamine clearance pathways under strain

Now the system is not only producing stimulation. It is holding onto it longer while also struggling to buffer it.
This is why two individuals with the same diagnosis can present completely differently.

The difference is pathway capacity.
When COMT is supported properly, the goal is improving clearance, reducing oxidative load, and stabilizing the nervous system so it can regulate more efficiently.