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.
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.†
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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.
Supplements to Support Healthy Histamine Levels.†
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Histamine Nutrients
Key Benefits and Actions† Supports a healthy seasonal histamine response, outdoors and indoors Provides nutrients needed to support healthy histamine breakdown You will notice it works quite quickly Guidance from Dr.Lynch Take Histamine Nutrients anytime of day or night, as needed. There may be times when you need to take it a few times a day and there may be other days you don’t need it at all. Only take it when you want to experience healthy histamine levels. If you currently have healthy histamine levels, do not take it. † You want healthy levels of histamine. You don’t want histamine to be too high or too low. By taking Histamine Nutrients when your histamine levels are high, you can support healthy histamine levels. By taking Histamine Nutrients when your histamine levels are currently healthy, they may dip down too low.† Too low of histamine is associated with drowsiness, constipation, difficulty learning, slower heart rate, possibly higher blood pressure and possibly cold hands and feet. To support Histamine Nutrients, it’s best to combine with HistaminX, ProBiota ™HistaminX™ and Optimal Electrolyte.† HistaminX supports the healthy storage of histamine inside your cells. This is important because if histamine is inside your cells, it cannot contribute to histamine intolerance. Histamine has to be released from your cells and bind to your histamine receptors in order to cause a histamine response. So, by taking HistaminX, you’re supporting healthy storage of histamine so it stays in your cell versus leaking out and activating a histamine response. Take a serving of HistaminX as needed anytime of day or night. For best results, it should be taken every day especially during troublesome seasons.† ProBiota™ HistaminX™ supports a healthy histamine level within your microbiome. If your probiotics or the bacteria in your digestive system produce histamine, the risk of histamine intolerance goes way up. ProBiota™ HistaminX™ contains strains of beneficial bacteria which are known to support healthy histamine levels. Take 1 capsule after dinner. For best results, it should be taken every night for a month, then rest a couple weeks and then use a few nights a week for maintenance.† Optimal Electrolyte supports healthy hydration. Hydration is paramount for a healthy histamine level. If dehydrated, your blood histamine levels are automatically higher than if you are hydrated. By having more water in your blood and inside your cells, you are effectively decreasing the concentration of histamine. Drink one serving each day and ideally first thing upon waking up in the morning - even before your morning coffee. You may find that you don’t even need your morning coffee after drinking a glass.† Who Needs Histamine Nutrients Everyday you’re exposed to compounds which may trigger histamine release. How is it that you’re struggling with histamine intolerance while others, who are exposed to the same things, are not? The answer is you cannot break histamine down very well and they can. Histamine intolerance is primarily caused by your reduced ability to break histamine down and eliminate it from your body. In other words, your histamine genes are dirty. Clean your histamine genes. Histamine Nutrients cleans your histamine genes. It contains a synergistic collection of nutrients which support total body histamine breakdown.† If you relate to one or more of the following statements, then Histamine Nutrients may be helpful for you in supporting healthy histamine levels:† I want to walk outside and breathe freely through my nose. I desire feeling comfortable around pets. When mosquitos bite me, I get big, itchy bumps that I scratch profusely. If my skin gets scratched, red lines stay on my skin for quite some time. I want to fall asleep like a healthy person. As a man, I tend to orgasm too quickly. I tend to get irritable or headaches around fragrances. I tend to be more sensitive to EMF and WiFi than others. I have a dirty histamine pathway (DAO, HNMT, NAT2, ALDH, MAOA, MAOB). I have tried, or currently use, Histamine Digest and still experience histamine symptoms. When exercising, I sweat profusely, often getting a red face or ringing in my ears. The synergistic blend of nutrients found in Histamine Nutrients supports healthy histamine metabolism. It also supports the body’s normal breakdown of histamine’s toxic byproducts.† Key Ingredients In Histamine Nutrients DAO2TM (Diamine oxidase): A patented, porcine-derived enzyme. DAO is the enzyme responsible for breaking down histamine in the digestive tract† Zinc, Vitamins B1 & B3: Nutrient cofactors for aldehyde metabolism and the ALDH enzyme† SAMe: A cofactor for the HNMT enzyme that breaks down histamine throughout the body† Alpha Keto-Glutarate: Supports the normal breakdown of ammonia, a toxic byproduct of histamine metabolism† PQQ: supports normal breakdown of hydrogen peroxide and aldehydes † Vitamin C: stabilizes mast cells to support healthy histamine release † Vitamin B6: a cofactor for the DAO enzyme and supports healthy ammonia levels† Vitamin B5 (pantothenic acid): a cofactor for the NAT2 enzyme, which metabolizes histamine to acetyl histamine and eliminates it in the urine † Albion® is a registered trademark of Balchem Corporation or its subsidiaries. LifePQQ® is a trademark of Nutraland USA, Inc. DAO2™ is a licensed trademark of Diem Direct, LLC used with permission. Suggested Use As needed, take 1-2 capsules with food. Use during the day to support healthy histamine breakdown. Use during the evening to support a healthy onset of sleep.† Use as directed by your healthcare professional.Note: For additional histamine support, consider adding HistaminX to stabilize histamine. To support healthy levels in the digestive system, consider ProBiota™ HistaminX™and/or DAO Enzyme.† Warnings Consult with your healthcare practitioner prior to use. Do not use if inner tamper seal is damaged Suitable for Bariatric, methyl sensitive, pregnancy, breastfeeding, ages 4 and up Delivery Method Capsules How to Store Keep closed in a cool, dry place out of reach by children. Dr. Lynch’s Tips Take Histamine Nutrients anytime of day or night, as needed. There may be times when you need to take it a few times a day and there may be other days you don’t need it at all. Only take it when you want to experience healthy histamine levels. If you currently have healthy histamine levels, do not take it.† You want healthy levels of histamine. You don’t want histamine to be too high or too low. By taking Histamine Nutrients when your histamine levels are high, you can support healthy histamine levels. By taking Histamine Nutrients when your histamine levels are currently healthy, they may dip down too low. Too low of histamine is associated with drowsiness, constipation, difficulty learning, slower heart rate, possibly higher blood pressure and possibly cold hands and feet. To support Histamine Nutrients, it’s best to combine with HistaminX, ProBiota™ HistaminX™ and Optimal Electrolyte.† HistaminX supports the healthy storage of histamine inside your cells. This is important because if histamine is inside your cells, it cannot contribute to histamine intolerance. Histamine has to be released from your cells and bind to your histamine receptors in order to cause a histamine response. So, by taking HistaminX, you’re supporting healthy storage of histamine so it stays in your cell versus leaking out and activating a histamine response. Take a serving of HistaminX as needed anytime of day or night. For best results, it should be taken every day especially during troublesome seasons.† ProBiota™ HistaminX™ supports a healthy histamine level within your microbiome. If your probiotics or the bacteria in your digestive system produce histamine, the risk of histamine intolerance goes way up. ProBiota™ HistaminX™ contains strains of beneficial bacteria which are known to support healthy histamine levels. Take 1 capsule after dinner. For best results, it should be taken every night for a month, then rest a couple weeks and then use a few nights a week for maintenance.† Optimal Electrolyte supports healthy hydration. Hydration is paramount for a healthy histamine level. If dehydrated, your blood histamine levels are automatically higher than if you are hydrated. By having more water in your blood and inside your cells, you are effectively decreasing the concentration of histamine. Drink one serving each day and ideally first thing upon waking up in the morning - even before your morning coffee. You may find that you don’t even need your morning coffee after drinking a glass.†
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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†
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Fish Oil
Key Benefits and Actions† Burp-free, taste-free and easy to swallow 400 mg of DHA + 400 mg of EPA as triglycerides per softgel Wild caught, cold water Norwegian fish oil tested for purity Your joints, circulation, and brain all need omega-3 fatty acids. These essential fatty acids are found in the highest concentrations in fatty fish oil. Omega-3 fats can be obtained by eating fatty fish or taking fish oil supplements. Types of fish like mackerel, sardines, anchovies, and krill oil are good sources of omega-3 fatty acids. Without a diet high in fish consumption, getting the proper intake of omega-3 required can be difficult. That’s why many prefer omega-3 fatty acid supplements.† Fish oil supplements can be sourced from plants like flaxseed or fatty fish oils. Plant-based omega-3 supplements contain alpha-linolenic acid (ALA). Unfortunately, this has fewer health benefits than the omega-3 fatty acids found in fish oil supplements. But how do you find a fish oil supplement that is clean and not full of toxins and heavy metals? A single softgel of Fish Oil provides nearly 800 milligrams of omega-3 fatty acids in natural triglyceride form, sourced from Norwegian cold water fish. Molecular distillation and unique filtration methods are utilized. These help ensure purity and remove heavy metals, pesticides, PCBs, and other contaminants. This is another benefit of taking fish oil supplements over regularly eating fish.† Fish Oil is 3rd party tested for impeccable purity, cleanliness, and stability standards.† Fish Oil includes eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These important omega-3 fatty acids have many health benefits:† Helps support healthy memory function, cognitive/mental health, and eye health Helps support normal inflammatory responses Helps support healthy blood pressure, cholesterol, and triglyceride levels Helps support heart health and cardiovascular health Helps support normal healthy blood clotting In addition to supporting heart health, omega-3 fatty acids support healthy joint function and normal body weight.† The benefits of omega-3 to our brain, heart, and joints are vast. Ensuring the proper essential fatty acids and type of omega-3 fatty acids is important. Try Fish Oil today to better support your body’s needs.† Key Ingredients Inside the Uncompromising Quality of Our Ingredients Third-party tested, pure cold water Norwegian fish oil Healthy heart, joint, and brain support through a natural triglyceride-bound form of fish oil. Contains a powerful 400 mg of EPA and 400 mg of DHA per softgel.† Lipase Breaks down fats into fatty acids and glycerol, aiding in fat digestion.† Lemon oil Keeps fish oil soft gels smelling fresh and minimizes any fishy aftertaste. † Suggested Use As needed, take 1 softgel with food any time of the day or night. Use as directed by a healthcare practitioner. NOT Suitable for Vegetarian, vegan, infants Suitable for Bariatric, methyl sensitive, pregnancy, breastfeeding, ages 4 and up Delivery Method Softgels How to Store Keep closed in a cool, dry place out of reach by children. Dr. Lynch’s Guidance Fish oil is one of those foundational supplements. I take Fish Oil nearly every night after dinner, along with my ProBiota HistaminX. Do not buy fish oil in liquid form. The oxygen inside the bottle immediately damages it, causing the fats to become rancid. Rancid fish oil is harmful, not helpful. If you have a young kid or cannot swallow the soft gels, go ahead and pop one of the soft gels of Fish Oil. Put it on a bite of food or onto a spoon. The lemon oil and lipase already help a lot with the taste, so you may not need anything else to make it easy to take by mouth. If you have a picky eater, add a drop or two of maple syrup or honey with the Fish Oil before giving it. Some nights, I just bite the Fish Oil softgel before I swallow it to coat my mouth with the beneficial EPA and DHA oils. Then I swallow it. It’s not fishy at all. I then chew the softgel like a piece of gum until it’s gone. After all, the softgel is simply made of gelatin. Quality fish oil should not taste fishy - and this one does not. Fish oil burps happen because you cannot absorb the fat very well. The added lipase enzyme makes it easy for your body to absorb the beneficial fatty EPA and DHA oils.†
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Stress Nutrients
Key Benefits and Actions† Non-glandular adrenal support supplement Synergistic nutrients and herbs for healthy stress responses Supports healthy cortisol regulation and feelings of calm Who Needs Stress Nutrients We all experience stress. If your ability to cope becomes compromised by weak adrenal function, it can lead to a multitude of health concerns. While we cannot stop stress, we can support our body’s innate ability to handle it in a healthy way.† Stress Nutrients is a vegan-friendly adrenal support supplement. Nutrients, plant extracts, and herbs synergistically support adrenal health and a normal stress response.† Stress Nutrients supports healthy adrenal function. This non-glandular formula is vegan-friendly. It features a blend of nutrients and adaptogenic botanicals to help support your adrenal glands normal response to stress. For glandular adrenal support, consider our Adrenal Cortex .† Your adrenal glands need specific nutrients to function at their peak. Vitamin C, zinc, and pantothenic acid (vitamin B5) are known as vital players in adrenal health. The specific plant extracts and adaptogenic herbs in this formula support your immune system, mood, healthy blood sugar levels, and endocrine system (hormones).† Stress Nutrients supports a healthy response to stress by supporting feelings of calmness, balance, and resilience. This unique blend helps to maintain healthy immune responses, mood, and cortisol levels.† When a stressful situation arises, your adrenal glands release the stress hormone cortisol. Its production stops when you are calm again. Repeated exposure to stress can lead to constantly elevated cortisol levels. This can trigger a feedback cycle where the body is stuck in a stress response state. Over time, this can deplete the adrenal glands and lead to adrenal fatigue. This state of weakened adrenal function can disrupt energy production, compromise immunity, and even interfere with nervous system function. Stress Nutrients contains adaptogenic herbs that support healthy cortisol regulation. These include ashwagandha root, Siberian ginseng, American ginseng, rhodiola rosea, and schisandra. Cordyceps are added for their additional adaptogenic properties and to support a healthy immune response.† Adaptogens are like your adrenal’s thermostat. They assist in keeping adrenal levels in healthy and normal ranges. Balanced cortisol levels support adrenal resilience during the day while promoting restful sleep at night.† With the right tools in your toolbox, you can handle anything life throws at you. That all starts with healthy adrenal function. Start supporting your adrenal health today with Stress Nutrients by Seeking Health.† Key Ingredients Inside the Uncompromising Quality of Our Ingredients Vitamin B5 (pantothenic acid) Essential for proper cortisol regulation and adrenal function. It is also a cofactor for the NAT2 enzyme, which metabolizes histamine to acetyl histamine and eliminates it in the urine.† Zinc (Albion®) Supports the healthy and normal functioning of cells responsible for immune response, inflammatory signaling, and oxidative stress. Aids in cortisol regulation and utilization of B vitamins.† Adaptogenic herbs and mushrooms Herbs such as KSM-66® Ashwagandha Extract, Rhodiola rosea, Siberian ginseng, American ginseng, and Schisandra along with the mushroom cordyceps, belong to a category of medicinal plants known as adaptogens. The chemicals within these plants appear to support the body's natural ability to regulate the stress response. They also support overall balance and calibration of mood and energy.† Deglycyrrhizinated licorice (DGL) & Ginger In Chinese health practices, licorice and ginger support defensive Qi. Those needing adrenal support are often low in defensive Qi, or support a healthy immune system leaving them more susceptible to health issues.† Albion® is a registered trademark of Balchem Corporation or its subsidiaries. KSM-66® is a registered trademark of Ixoreal Biomed Inc. Suggested Use As needed, take 1-3 capsules in the morning or as directed by your healthcare professional. Warnings Consult a healthcare professional prior to using. Do not use if tamper seal is damaged. Suitable for Bariatric, methyl sensitive, breastfeeding, vegetarian, vegan, ages 4 and up Delivery Method Capsules Age Suitability Adults, ages 4 and up How to Store Keep closed in a cool, dry place out of reach by children.
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