You can increase histamine levels through diet, supplementation, exercise, and by avoiding substances that break histamine down too quickly. Histamine is produced naturally in your body when an enzyme converts the amino acid L-histidine into histamine, using vitamin B6 as a helper. That single-step conversion means your histamine levels depend on three things: how much histidine you take in, how active that enzyme is, and how fast your body clears histamine once it’s made.
How Your Body Makes Histamine
Histamine production starts with L-histidine, an essential amino acid you get from food. An enzyme called histidine decarboxylase strips a chemical group off histidine and converts it directly into histamine. This reaction requires vitamin B6 in its active form as a cofactor, so a B6 deficiency can slow the process down.
Once produced, histamine acts as a signaling molecule throughout the body. It regulates immune responses, stimulates stomach acid production, and works as a neurotransmitter in the brain. Your body also actively breaks histamine down, primarily through an enzyme called diamine oxidase (DAO) in the gut. The balance between production and breakdown determines how much histamine is circulating at any given time. For reference, normal whole blood histamine ranges from 180 to 1,800 nmol/L.
Eat More Histamine-Rich Foods
The most straightforward way to raise histamine is to eat foods that already contain it. A reliable rule: foods that are fermented, aged, or heavily processed tend to carry the most histamine. The bacteria involved in fermentation produce histamine as a byproduct, so the longer a food has been aged or cultured, the more histamine it typically contains.
Foods and drinks with particularly high histamine levels include:
- Aged cheese (the longer it’s aged, the higher the histamine)
- Cured and dry-fermented meats like salami, pepperoni, and prosciutto
- Fermented foods like sauerkraut, kimchi, and miso
- Canned or semi-preserved fish (especially tuna, mackerel, and sardines)
- Alcoholic beverages, particularly red wine and beer
Certain vegetables also carry notable amounts: tomatoes, eggplant, and spinach. Mushrooms and soybeans contain histamine-like substances that can amplify the effect. Beyond foods that contain histamine directly, some fruits trigger your body to release its own stored histamine. These include bananas, pineapple, papaya, citrus fruits, strawberries, and cherries.
Supplement With L-Histidine
Since histamine is built from L-histidine, supplementing with the precursor amino acid can increase the raw material available for conversion. Clinical research has used doses of 4.0 to 4.5 grams of histidine per day, which have been associated with improvements in body composition, blood sugar markers, and reduced inflammation. There’s also evidence that histidine supplementation improves cognitive function, reduces anxiety, and supports better sleep, potentially through its conversion to histamine in the brain.
The relationship between oral histidine and brain histamine levels is not perfectly direct in humans, but the biochemical pathway is clear: more histidine in the system gives the enzyme more substrate to work with. Safety data from a 2020 amino acid assessment workshop proposed a no-observed-adverse-effect level of 8.0 grams per day for supplemental histidine in healthy adults, applicable to high-purity supplements or fortified foods. Starting lower and working up is reasonable if you’re new to it.
Because vitamin B6 is required for the conversion, making sure your B6 intake is adequate matters. Without enough of this cofactor, extra histidine won’t convert as efficiently.
Slow Down Histamine Breakdown
Raising histamine isn’t only about producing more of it. You can also keep levels elevated by reducing how quickly your body clears it. Diamine oxidase (DAO) is the main enzyme responsible for breaking down histamine in your gut. Anything that inhibits DAO will allow more histamine to stay active in your system longer.
Several common substances deplete or block DAO activity:
- Alcohol (both increases histamine intake and suppresses the enzyme that clears it)
- Black tea and mate tea
- Energy drinks
- Certain medications, including some antinausea drugs and mucolytic (phlegm-thinning) medications
Fermented teas can block DAO enzymes, while green tea, which is not fermented, does not have this effect. If you’re trying to increase histamine, combining high-histamine foods with DAO-suppressing beverages like alcohol or black tea creates a compounding effect. Red wine with aged cheese, for instance, delivers a high histamine load while simultaneously slowing breakdown.
Use Histamine-Producing Probiotics
Certain bacterial strains that live in your gut or are found in probiotic supplements actively produce histamine as part of their metabolism. If you want to increase histamine from the inside out, choosing the right probiotic strains can help.
The most common histamine-producing strains in commercial probiotics and fermented foods include Lactobacillus reuteri, Lactobacillus casei, Lactobacillus bulgaricus, Streptococcus thermophilus, and Lactobacillus delbrueckii. Many of these are standard in yogurt and fermented dairy products, which is one reason dairy-based fermented foods tend to raise histamine levels effectively. If you’re selecting a probiotic supplement specifically to boost histamine, look for products containing these strains rather than avoiding them.
Exercise to Trigger Histamine Release
Aerobic exercise is a potent and often overlooked trigger for histamine production. During endurance exercise, your body activates pathways that both stimulate new histamine production and release histamine from mast cells stored within skeletal muscle tissue. This is why some people experience skin flushing, itching, or redness during vigorous workouts: it’s a histamine-mediated response.
Research published in the Journal of Applied Physiology describes histamine as a “molecular transducer of adaptation to endurance exercise training,” meaning it plays a functional role in how your muscles adapt to aerobic training over time. The histamine released during exercise helps dilate blood vessels in working muscles, increasing blood flow and nutrient delivery. Regular endurance training, whether running, cycling, swimming, or brisk walking, repeatedly activates this release mechanism. The more consistent and intense the aerobic work, the greater the histamine response tends to be.
Putting It Together
The most effective approach combines several of these strategies. Eating histamine-rich fermented and aged foods provides a direct external source. Supplementing with L-histidine (in the range of 4 to 4.5 grams daily, with adequate vitamin B6) gives your body more raw material to manufacture its own. Consuming DAO-inhibiting beverages like black tea or alcohol slows clearance. Choosing histamine-producing probiotic strains adds an internal production source. And regular aerobic exercise triggers release from your body’s own mast cell stores.
If you’re coming from a baseline of low histamine and want to gauge whether your efforts are working, a whole blood histamine test can give you a measurable number to track. Normal range sits between 180 and 1,800 nmol/L, a wide window that reflects how much individual variation exists. Keep in mind that histamine levels fluctuate throughout the day and in response to meals, exercise, and stress, so single measurements provide a snapshot rather than a definitive picture.