What is histamine?
Histamine is a natural chemical messenger. It is released by immune cells during allergic reactions, which leads to familiar effects such as itching and a runny nose. It also helps stomach cells produce acid for digestion and acts in the brain to support wakefulness. Histamine also enters the body through certain foods, especially aged, fermented or leftover ones. Your body keeps levels balanced by constantly making and breaking it down.
How your genes play a role
Genes influence both sides of that balance. HDC makes histamine. DAO breaks down histamine mainly in the gut, while HNMT clears it inside cells. Receptor genes such as H1R and H2R determine how cells respond to it. Other genes in this panel, including MAO-A, ALDH2, COMT and MTHFR, take part in wider pathways that process related compounds.
Some people notice they feel different after certain foods or drinks, such as aged cheese or wine, while others do not. Understanding your histamine-related genes may help you make sense of those patterns. It can give you a more informed starting point for conversations with your clinician or a dietitian, and may help you observe your own responses with more curiosity and less guesswork.
What your report shows
Your Histamine results are explained in plain language in your private EvoDNA account, alongside the other areas in your kit.
- Breakdown capacityVariants in DAO and HNMT that may influence how efficiently you clear histamine.
- ProductionHow your histamine-making gene may be tuned.
- Receptor responseVariants in receptor genes linked to how your cells respond to histamine signals.
- Connected pathwaysRelated genes that help process compounds sharing the same metabolic routes.
| Gene | What it does | Result |
|---|---|---|
| DAO | Produces an enzyme in the gut lining that breaks… | Typical |
| HNMT | Encodes an enzyme that inactivates histamine inside cells, including… | Moderate effect |
| HDC | Makes the enzyme that builds histamine from the amino… | Typical |
Each result comes with a plain-language explanation and practical points to discuss with your clinician.
Illustration only. Your report reflects your own genetic results.
Genes we analyze
| Gene | Role |
|---|---|
| DAO | Produces an enzyme in the gut lining that breaks down histamine from food before it is absorbed. |
| HNMT | Encodes an enzyme that inactivates histamine inside cells, including in the brain and airways. |
| HDC | Makes the enzyme that builds histamine from the amino acid histidine. |
| H1R | Encodes the histamine receptor involved in many allergy-type responses, such as itching and sneezing. |
| H2R | Encodes the histamine receptor that helps signal the stomach to release acid. |
Full panel: 12 genes
DAO, HNMT, ABP1, ALDH2, MAO-A, COMT, MTHFR, TPMT, TPHS1, HDC, H1R, H2R
Putting results to use
Many people use their results as a starting point for conversations with their clinician about:
Some people keep a simple food diary to notice how aged or fermented foods affect them.
Histamine can build up in food over time, so freshly prepared meals are often discussed in this context.
Alcohol is commonly mentioned in histamine conversations because of how it is processed.
A clinician or dietitian can help you explore food changes safely and without unnecessary restriction.
Questions
Does a DAO variant mean I have histamine intolerance?
No. A variant may influence enzyme activity, but symptoms depend on many factors, including diet, gut health and medication. Your report is context to discuss with a professional.
Why are genes like COMT and MTHFR in this area?
These genes take part in methylation and related pathways that also process other compounds. They are included to give a fuller picture of how your body handles connected chemical messengers.
Should I avoid high-histamine foods?
Not based on genetics alone. Cutting foods unnecessarily can narrow your diet. A clinician or dietitian can help you decide whether any changes make sense for you.
Only interested in this area? The Histamine & Reactions Genetic Report is available on its own for $99.00.
