How Do You Reduce Histamine in the Body?

If you are dealing with a body that seems to overreact to certain meals, a glass of wine, or a stressful week, you have probably wondered how to bring histamine down. The honest answer: there is no single drink, cleanse, or detox that rapidly “flushes” histamine out of your system. What tends to help is a structured, multi-step approach — reducing your total histamine load, supporting the enzymes that break it down, and identifying your personal triggers (Advanced Functional Medicine; Healthpath).

A helpful way to picture it is a sink. Histamine from food and from your own body is the water flowing in; enzymes like DAO are the drain. When the faucet runs faster than the drain can keep up, the sink overflows. Our guide to the histamine bucket walks through this idea in more detail. The four steps below work on both sides: turning down the faucet and keeping the drain clear.

1. Follow a Low-Histamine Elimination Diet

Diet is usually the first place to start, because it is the part of your histamine load you have the most control over. A short, temporary elimination trial — typically 2 to 4 weeks — limits foods that are high in histamine or that may prompt your body to release its own (Johns Hopkins Medicine). For a fuller walkthrough, see our low-histamine diet guide.

Food lists adapted from WebMD, Oshi Health, and Allergy Clinic. Want to go deeper? Read Foods High in Histamine, What Alcohol Is Highest in Histamine, and What Are Histamine Liberators.

Reintroduce foods one at a time

An elimination diet is a test, not a permanent lifestyle. After 2 to 4 weeks, slowly add one potential trigger food back at a time and note how you feel over the next day or two. This helps you map your personal tolerance instead of avoiding whole food groups indefinitely. The Johns Hopkins Children’s Center Low Histamine Diet PDF is a useful reference, and working with a registered dietitian can help you keep your nutrition balanced along the way.

2. Support DAO Enzyme Activity

Diamine oxidase (DAO) is the primary enzyme responsible for breaking down histamine from food in your digestive tract. If you are new to it, start with What Is Diamine Oxidase (DAO) Enzyme?

• Supporting nutrients: Vitamin B6, vitamin C, copper, and zinc play roles in the body’s natural DAO production and histamine processing (Dr. Ana-Maria Temple).
• DAO supplements: Taking a DAO enzyme supplement right before a meal may help support the breakdown of dietary histamine in the gut.*

One note in the spirit of honesty: the science here is still developing. The Cleveland Clinic points out that low DAO activity as a cause of histamine-related reactions hasn’t been fully validated. DAO support is best viewed as one tool alongside diet changes, not a replacement for them.

3. Support Healthy Mast Cell Activity and Gut Health

Histamine doesn’t only come from food. Mast cells, a type of immune cell, store and release histamine of their own. Some nutrients are studied for how they interact with this process:

• Quercetin, vitamin C, and luteolin: These plant compounds and nutrients are researched for their role in supporting healthy mast cell activity and a balanced histamine response (Healthpath).* OmneDiem’s Histamine Complete pairs 15,000 HDU of DAO with quercetin, vitamin C, bromelain, and stinging nettle leaf for both seasonal and dietary histamine support.*
• Gut health: DAO is produced in the lining of the intestine, so the health of your gut matters. Gut imbalances and inflammation may affect how well the body produces DAO, which is why supporting the gut lining and microbiome — ideally with guidance from a practitioner — is often part of a longer-term plan (Medical News Today).

4. Review Medications and Lifestyle Factors

• Check your medications: Some prescription and over-the-counter medications may raise histamine levels or interfere with how the body processes it. The Cleveland Clinic notes, for example, that some opioids and imaging contrast agents can increase histamine. Ask your doctor or pharmacist whether anything you take could be playing a role, and review the Cleveland Clinic Histamine Intolerance Guide. Never stop or change a prescribed medication without your doctor’s input.
• Understand what antihistamines do: Over-the-counter H1 and H2 antihistamines (such as cetirizine, loratadine, or famotidine) don’t lower or clear histamine from your body. They block histamine receptors so histamine has less effect (Allergy Clinic). DAO works differently, supporting the breakdown of histamine from food in the gut.* If you are curious how the two compare, see Allergies or Histamine Intolerance?
• Prioritize sleep and stress management: Poor sleep and ongoing stress can affect cortisol and inflammatory signaling, which may add to your overall histamine load. Read more in Can Stress Cause Histamine Release?

The Bottom Line

Reducing histamine in the body is less about a quick fix and more about lowering the load and keeping the drain clear. Start with a short low-histamine elimination trial, reintroduce foods one at a time, support DAO activity with nutrients and, if it fits your plan, a DAO supplement taken before meals,* and look at the bigger picture of gut health, medications, sleep, and stress. A doctor or registered dietitian can help you put the pieces together for your own body.

Sources

• Advanced Functional Medicine — Managing Histamine Intolerance with Functional Medicine
• Johns Hopkins Children’s Center — Low Histamine Diet (PDF)
• WebMD — Foods High in Histamine
• Oshi Health — The Low Histamine Diet Guide
• Dr. Ana-Maria Temple — How to Reduce Histamine Naturally Through Diet
• Healthpath — How To Clear Histamine From Your Body
• Medical News Today — Histamine Intolerance: What Is It, Symptoms, Causes, and More
• Cleveland Clinic — Histamine Intolerance
• Allergy Clinic — What Is Histamine?
• Allergy Clinic — Histamine Intolerance Diet: Low Histamine Foods List

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.