If you've been researching histamine intolerance, chances are you've come across DAO enzyme. It's often described as the body's natural way of breaking down histamine from food, leading many people to ask: Can you actually increase DAO enzyme naturally?
The short answer is yes—to a degree. While there's no single food or supplement that dramatically boosts DAO production overnight, supporting your digestive health, eating nutrient-rich foods and reducing factors that interfere with DAO may help your body maintain healthy histamine metabolism.
Like many aspects of wellness, it's less about finding one "magic" ingredient and more about creating the right environment for your body to do what it was designed to do.
What is DAO enzyme?
DAO, short for diamine oxidase, is an enzyme primarily produced in the lining of the small intestine. Its job is to break down histamine that comes from food before it's absorbed into the bloodstream.
Histamine often gets a bad reputation, but it's actually an important compound your body naturally produces. It helps regulate digestion, supports communication between nerve cells and plays an important role in immune function.
Problems can arise when histamine builds up faster than your body can break it down. For some people, reduced DAO activity may be one piece of that puzzle.
It's important to note that DAO isn't responsible for all histamine in the body. Instead, it mainly helps process the histamine you eat, while other enzymes handle histamine produced internally.
Why might your body produce less DAO?
DAO production isn't determined by one factor alone. Instead, it's influenced by genetics, digestive health and overall lifestyle.
Some of the most common factors associated with lower DAO activity include:
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Genetic variations that affect DAO production
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Damage or irritation to the lining of the small intestine
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Certain medications that temporarily inhibit DAO
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Heavy alcohol consumption
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Nutrient deficiencies
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Chronic digestive conditions
This is why two people can eat the exact same meal and have completely different experiences.
Rather than focusing solely on histamine-containing foods, it can be more helpful to look at the bigger picture: How well is your digestive system functioning overall?
Nutrients that support healthy DAO activity
Your body builds enzymes using vitamins, minerals and amino acids obtained through your diet.
While no nutrient has been proven to "boost" DAO on its own, several play important roles in normal enzyme function.
Vitamin B6
Vitamin B6 acts as a cofactor for numerous enzymes throughout the body.
Foods naturally rich in vitamin B6 include:
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Chicken
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Turkey
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Salmon
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Chickpeas
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Bananas
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Potatoes
Copper
Copper is another mineral involved in normal DAO activity. Good food sources include:
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Cashews
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Sesame seeds
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Lentils
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Mushrooms
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Dark chocolate
Because excessive copper supplementation can be harmful, it's generally best to obtain copper through food unless directed otherwise by a healthcare provider.
Vitamin C
Vitamin C has long been studied for its relationship with histamine metabolism.
Although it doesn't directly create DAO, maintaining adequate vitamin C intake supports many normal physiological processes. Try adding foods such as:
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Bell peppers
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Kiwi
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Strawberries
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Broccoli
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Citrus fruits
Protein
Enzymes themselves are proteins. Consuming adequate protein throughout the day provides your body with the amino acids needed to produce countless enzymes—including DAO.
Your gut health and DAO are closely connected
Here's something that's often overlooked in conversations about histamine.
Because DAO is produced primarily in the small intestine, the health of your gut lining matters.
When your digestive system is functioning well, your body is better positioned to carry out countless processes—including producing enzymes involved in normal digestion.
That's why many practitioners focus less on "raising DAO" and more on supporting the overall environment where DAO is made.
Simple habits that support digestive wellness include:
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Eating a varied, fiber-rich diet
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Managing chronic stress
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Prioritizing sleep
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Staying hydrated
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Moving your body regularly
None of these are quick fixes. Together, though, they help create the conditions your body needs to function at its best.
Does avoiding histamine-rich foods increase DAO?
Not exactly.
Lowering your intake of high-histamine foods doesn't increase DAO production, but it may temporarily reduce the amount of histamine your body needs to process.
Common high-histamine foods include:
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Aged cheeses
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Cured meats
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Fermented vegetables
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Wine and beer
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Vinegar
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Smoked fish
That doesn't mean everyone needs to avoid these foods.
Many people tolerate them perfectly well. If you suspect histamine intolerance, it's best to work with a healthcare professional before making long-term dietary restrictions.
What about DAO supplements?
DAO supplements have become increasingly popular, but the research is still developing.
Most commercially available DAO supplements provide the enzyme itself rather than encouraging your body to make more of its own.
Some people choose to use them before higher-histamine meals, but they're not considered a long-term replacement for understanding why histamine metabolism may be disrupted in the first place.
As always, it's worth discussing supplements with your healthcare provider, particularly if you're managing ongoing digestive or allergy-related symptoms.
Wellness doesn't stop with your gut
Histamine conversations often begin with food, but your environment matters too.
Every breath you take introduces your body to pollen, dust and other airborne particles. Your nose is one of your body's first lines of interaction with the outside world, and the nasal microbiome plays an important role in maintaining that protective environment.At Wizard, we believe wellness starts with a deep breath.
Our Daily Probiotic Nasal Spray is powered by proprietary Nasalbiome™ technology and is designed to support a balanced nasal microbiome as part of your everyday routine. After long days outdoors or during allergy season, our Sinus Rinse Free + Clear gently washes away pollen, dust and environmental debris while helping your nasal passages feel clean and refreshed.
If you're looking to build simple daily wellness rituals, products like Multi-Benefit Probiotic Oral Strips can complement a broader routine focused on supporting overall wellness.
Because sometimes the smallest rituals are the ones that help you feel your best.
Supporting your body's natural balance
If you're looking for how to increase DAO enzyme naturally, the goal isn't to chase a single superfood or wellness trend.
Instead, think about supporting the systems that help your body function well every day. Eating a nutrient-rich diet, caring for your digestive health, getting enough sleep and creating simple wellness rituals all contribute to a healthier foundation.
Your body already knows how to make DAO. Sometimes, it just needs the right conditions to do what it does best. At Wizard, we're big believers in making those everyday habits feel a little more magic
Frequently asked questions
Can you naturally increase DAO enzyme?
You can't dramatically increase DAO production with one food or supplement, but supporting digestive health and eating nutrients involved in normal enzyme function may help your body maintain healthy DAO activity.
Which foods support DAO enzyme?
Foods rich in vitamin B6, copper, vitamin C and adequate protein provide nutrients involved in normal enzyme production and function.
Is DAO the same as a probiotic?
No. DAO is an enzyme that helps break down histamine from food, while probiotics are beneficial microorganisms that support a healthy microbiome.
Can gut health affect DAO levels?
Because DAO is primarily produced in the small intestine, digestive health may influence your body's natural DAO production.