The most common way people experience histamine intolerance is by absorbing high amounts of histamine from their digestive tract. This absorbed histamine then gets into the bloodstream and flows everywhere, leading to a plethora of symptoms.
Histamine Intolerance Guide
It’s incredible knowing how many symptoms are associated with high histamine. Once you realize this, it’s actually a relief as you now understand how they are all connected. More importantly, you understand that you’re not falling apart - it’s just that you may have high amounts of histamine flowing throughout your body.
Key Takeaways:
What It Is: Histamine intolerance happens when your body has more histamine than it can break down, causing responses like skin issues, digestive problems, headaches, irregular periods, breathing difficulties, and sleep troubles. It's not falling apart—it's excess histamine flowing through your body.
Main Causes: Weak digestion, inflamed intestines, bacterial infections, microbiome imbalance, nutrient deficiencies, food allergies (gluten and dairy especially), chronic stress, overtraining, high estrogen, mold exposure, fragrances, and genetic variations all contribute to histamine buildup.
Genetic Connection: DAO and HNMT genes break down histamine. When these "dirty genes" don't perform well due to overwork, nutrient deficiencies, or genetic variations, histamine levels stay elevated. Cleaning your genes requires reducing workload, avoiding triggers, and providing proper nutrients.
Three-Step Solution: Slow down by reducing stress and avoiding high-histamine foods (leftovers, fermented foods, caffeine). Avoid allergens, mold, fragrances, and harmful substances. Nurture with fresh foods, hydration, stress reduction, adequate sleep, and supportive supplements as needed.†
Supplement Support: DAO Enzyme helps break down dietary histamine in 5 minutes before meals.† ProBiota HistaminX supports healthy gut microbiome balance†. Histamine Nutrients provides cofactors for all five histamine-breaking enzymes. HistaminX stabilizes mast cells to prevent histamine release during seasonal triggers.†
What is Histamine Intolerance?
Histamine is a natural compound produced and heavily utilized by your body. Histamine intolerance happens when your body has more histamine than it needs, leading to excess histamine symptoms.
Causes of Histamine Intolerance
- Weak digestion
- Inflamed intestines
- Bacterial infections (gut especially)
- Eating things that harm your gut, such as processed food
- Food allergies and food intolerances (gluten and cow dairy especially)
- Microbiome imbalance
- Nutrient deficiencies
- Overactive immune system
- Weakened adrenals (low cortisol)
- Chronic viral infections
- Mold exposures
- Fragrances
- Mentally stressed
- Overtraining and high amounts of exercise
- High estrogen levels
- Genetics
The Genetic Connection to Histamine Intolerance
There are two main genes associated with histamine intolerance: DAO and HNMT. When these genes don’t perform, histamine levels stay high. A gene that is unable to perform at its best is what we call a Dirty Gene.
A dirty gene gets dirty in a few ways:
- by working too hard (you’re giving it too much work)
- does not have the nutrients needed to function (vitamins and minerals)
- a genetic variation is present • all of the above
How to Clean Your Dirty Genes
If there are three main ways to dirty your genes, then there are realistically three ways to clean your genes:
- Slow down. Reduce the workload the gene needs to do.
- Avoid. Limit the exposure to things which reduce the gene's function.
- Nurture. Increase the exposure to things that enhance its function.
Slow Down
- Emotional and mental stress. Triggers the production and release of histamine.
- Be mindful of overexercising. While regular physical activity is beneficial, overexercising leads to increased histamine release.
- High-histamine foods, such as leftovers, fermented and aged foods such as alcohol and aged meats and cheeses, kombucha, condiments, and sauces are best avoided as they can exacerbate histamine issues.
- Caffeinated drinks. Such as coffee, energy drinks, and tea can increase histamine release.
- Processed, sugary foods and beverages such as sodas, fast food, junk food, and lunch meats not only offer little nutritional value but can also trigger histamine release.
- Excessive amounts of proteins. Can lead to higher histamine levels.
Emotional and mental stress triggers the production and release of histamine.
Avoid
- Test for and avoid allergens. This includes both environmental allergens and those from your diet. Identifying and eliminating these triggers can significantly reduce histamine reactions.
- Harmful substances, such as cigarette smoke and excessive alcohol consumption, are detrimental and can worsen histamine-related conditions.
- Fragrances can trigger mast cell activation, so reduce exposure to scented dryer sheets, cologne, perfume, scented candles.
- Low smoke point oils, such as seed and vegetable oils, get damaged quickly by heat and trigger increased aldehydes. High aldehyde exposure reduces your ability to break down histamine. Use avocado oil or ghee.
- Mold is a major hidden trigger of histamine. Look everywhere for this. If it smells musty and the humidity is high, then there is mold.
- WiFi, Bluetooth, and cellular may be impossible to avoid, but you can still limit exposure at night. Ensure each of these are switched off while you are sleeping, and don’t use wireless headphones or earbuds.
Nurture
- Eat nutritious and fresh foods. This not only provides your body with the necessary nutrients for your enzymes that break down histamine to properly work but also helps in preventing various diseases.
- Adequately hydrate. To support overall bodily functions, including the metabolism of histamine.
- Implement stress-reduction techniques. Such as meditation, yoga, gardening, community, nature, or deep breathing exercises. Stress worsens histamine intolerance symptoms, so managing it effectively is crucial.
- Ensure adequate sleep. As poor sleep can exacerbate inflammation and histamine intolerance symptoms.
- Participate in regular light to moderate physical activity. For overall health and well-being, finding the perfect balance for you.
- Work with a healthcare provider or a registered dietitian. To tailor dietary and lifestyle changes to your specific needs, especially if you have underlying health conditions.
- Incorporate supportive supplements as needed.†
References
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7463562/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8945898/
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8945898/
- https://pubmed.ncbi.nlm.nih.gov/22510431/
- https://pubmed.ncbi.nlm.nih.gov/22435405/
†These statements have not been evaluated by the Food and Drug Administration (FDA). This product is not intended to diagnose, treat, cure, or prevent any disease.
Frequently Asked Questions
What causes histamine intolerance in 2026?
Histamine intolerance occurs when your body cannot break down histamine effectively. Common causes include weak digestion, inflamed intestines, bacterial infections, microbiome imbalance, nutrient deficiencies, food allergies (especially gluten and dairy), chronic stress, overtraining, high estrogen levels, mold exposure, and genetic variations in DAO and HNMT genes.
How do DAO and HNMT genes affect histamine?
DAO and HNMT are the two main genes responsible for breaking down histamine. When these genes don't perform optimally due to genetic variations, insufficient nutrients, or excessive workload, histamine levels stay elevated. This creates what Dr. Lynch calls "dirty genes" that need cleaning through proper nutrition and lifestyle changes.
What foods should I avoid with histamine intolerance?
Avoid high-histamine foods including leftovers, fermented foods, aged meats and cheeses, alcohol, kombucha, condiments, sauces, caffeinated drinks, processed foods, sugary beverages, and excessive protein. Also limit low smoke point oils like seed and vegetable oils, which increase aldehydes that reduce histamine breakdown.
Can stress worsen histamine intolerance?
Yes, emotional and mental stress directly triggers histamine production and release in your body. Chronic stress also weakens adrenal function and depletes nutrients needed for histamine breakdown. Implementing stress-reduction techniques like meditation, yoga, deep breathing, adequate sleep, and light to moderate exercise helps support healthy histamine levels.
How does mold exposure trigger histamine issues?
Mold is a major hidden trigger of histamine intolerance. Mold exposure activates mast cells to release histamine as an immune response. Look for musty smells and high humidity areas in your home, car, and workplace. Reducing mold exposure is essential for managing histamine levels effectively.
What nutrients support healthy histamine breakdown?
Key nutrients include vitamin C for DAO production and mast cell stability, vitamin B6 as a DAO cofactor, vitamin B5 for the NAT2 enzyme, zinc for enzyme function, SAMe for HNMT enzyme support, and alpha keto-glutarate for ammonia breakdown. Fresh, nutritious foods and adequate hydration are also essential.†
3 Reviews
Comprehensive Histamine Support
Dr. Lynch, along with his research team, developed the most comprehensive tool to help you identify your various histamine genetic vulnerabilities. You will literally see where you are genetically vulnerable.
Once you know which genes are contributing to your histamine issues, actionable information is provided. As you work on applying the recommendations provided, your genetic vulnerability significantly reduces as the genetic function improves. This genetic report uses your genetic raw data from 23andme, Ancestry® and SelfDecode.
Additional Supportive Supplements for Healthy Histamine Levels†
If you are really struggling with histamine intolerance and mast cell activation, you may need additional support for healthy histamine levels and activation†
Shop All Supplements for Healthy Histamine Levels
Stress Nutrients
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