If you’ve ever left a meal feeling bloated, flushed, itchy or suddenly tired, you’re not imagining it. For some people, food does more than just fuel the body. It can also cause symptoms that affect how they feel for hours or days. One possible reason is histamine.
If histamines in your food cause issues, a low histamine diet may help reduce symptoms. That said, true histamine intolerance is rare and not always the underlying cause.
We talked with Lindsey Howe, a registered dietitian at Banner - University Medicine, to learn about the low histamine diet. She shares which foods trigger histamine, which foods are safer to eat and tips to help you follow this diet.
What is histamine, really?
Histamine is a natural chemical made from an amino acid called histidine. Your body makes it every day. It helps with digestion, immune reactions and blood flow.
“Histamine acts like a chemical messenger in the body,” Howe said. “It plays important roles in gastric acid secretion, blood vessel function, smooth muscle contraction and immune signaling.”
Histamine isn’t the enemy. The problem happens when too much histamine builds up in your body. That excess can come from two places.
“Your body releases histamine naturally on its own or it can come from food, especially foods that are aged, fermented or stored too long. Fresh foods usually contain very little histamine,” Howe said. “When your body can’t break histamine down fast enough, symptoms can show up.”
How histamine builds up and triggers symptoms
Your body relies on enzymes to keep histamine levels in check.
“One key enzyme, called diamine oxidase (DAO), breaks down histamine in the intestine,” Howe said. “Another enzyme, histamine-N-methyltransferase (HNMT), works inside cells to manage histamine produced within the body.”
When DAO activity is reduced and histamine intake is high, histamine can build up in the body. This is sometimes called histamine intolerance (HIT) but it’s not a formal medical diagnosis.
When that happens, symptoms can affect many parts of your body, including:
- Digestive system: bloating, abdominal pain, diarrhea, constipation
- Respiratory system: nasal congestion, sneezing, shortness of breath
- Skin: flushing, itching, hives, swelling
- Head and nervous system: headaches or migraines
- Heart and circulation: rapid heart rate or low blood pressure
Because these symptoms overlap with other conditions, histamine intolerance often goes unnoticed.
Why a low histamine diet helps
A low histamine diet works by reducing the amount of histamine your body has to process at one time. For some people who don’t break down histamine efficiently, cutting back on high histamine foods may help ease symptoms.
Certain drinks and medications can also make symptoms worse. Howe notes that alcohol, some teas, citrus fruits, nuts, food additives or preservatives and nonsteroidal anti-inflammatory drugs (NSAIDs) may trigger histamine release or block DAO activity in some people.
For some people, following a low histamine diet may help reduce symptoms and improve quality of life.
“This approach isn’t about eliminating histamine completely; that’s not possible,” Howe said. “It’s about lowering your total exposure so the body can maintain balance.”
Foods that are higher in histamine
Histamine levels in food depend more on processing, aging, fermentation and storage than the food itself.
Foods commonly linked to higher histamine levels include:
- Fermented foods like sauerkraut, kimchi and kombucha
- Aged cheeses such as cheddar, parmesan and blue cheese
- Fermented dairy, like yogurt
- Cured or smoked meats, including bacon and salami
- Alcohol, especially wine and beer
- Fermented soy products like soy sauce, miso and tempeh
- Canned or preserved fish, including tuna and sardines
- Vinegar and vinegar-based condiments
“Some foods don’t contain much histamine but may still trigger your body to release it,” Howe said. “These can include citrus fruits, bananas, avocados, pineapple and certain nuts.”
Foods that are often better tolerated
Fresh, minimally processed foods are generally easier on a low histamine diet. These often include:
- Fresh meats and freshly caught or immediately frozen fish
- Eggs
- Fresh dairy like milk, ricotta or mozzarella
- Fresh vegetables and fruits, based on your tolerance
- Grains such as rice and other minimally processed grains
- Mild herbs and spices
“It’s important to remember that histamine levels vary widely,” Howe said. “Freshness, preparation, storage and individual tolerance all play a role. Foods considered safe for you may not be for someone else.”
This is why flexibility (and not perfection) is important.
Common misconceptions about low histamine diets
One common belief is that histamine content alone determines whether a food will cause symptoms. In reality, reactions may also come from how your body releases histamine or how enzymes function.
Another issue is over-restriction. “Because histamine intolerance doesn’t have clear diagnostic criteria and overlaps with conditions like IBS or migraines, some people remove many foods unnecessarily,” Howe said. “This can affect nutrition and quality of life without addressing the root cause.”
A short-term elimination followed by a structured reintroduction is often a better approach. Talk to your health care provider or a registered dietitian about how to get started.
How to safely try a low histamine diet
Low histamine diets can feel restrictive, especially if you eliminate multiple food groups.
To stay balanced:
- Include a fresh protein source at each meal
- Eat a variety of tolerated fruits, vegetable and grains
- Avoid long-term elimination without reintroducing foods
- Watch for gaps in protein, calcium, fiber and key nutrients
“There is no one-size-fits-all plan,” Howe said. “A short-term elimination, followed by a gradual reintroduction of foods, often works best. A registered dietitian can help you find balance and avoid unnecessary food restrictions.”
Shopping, storing and cooking matters more than you think
Histamine doesn’t just come from food choices. It also comes from how food is handled.
Helpful tips include:
- Buy fresh meat, fish and dairy when possible
- Avoid fermented, cured or heavily processed foods
- Cook foods soon after purchase
- Freeze leftovers instead of storing them for days
- Avoid keeping cooked protein in the fridge longer than 24 hours
- Store foods in airtight containers and label with dates
Batch-cooking grains or soups and freezing individual portions can make low histamine eating more realistic.
Simple low histamine meal ideas
- Breakfast: Oatmeal with fresh pears and coconut milk
- Lunch: Grilled chicken with zucchini and carrots, drizzled with olive oil
- Snack: Apple slices with sunflower seed butter
- Dinner: Baked white fish with sweet potatoes and green beans
Fresh herbs like parsley or thyme add flavor without increasing histamine.
Bottom line
A low histamine diet isn’t about cutting everything out. It’s about paying attention, eating fresher foods and giving your body a break from overload.
Start small. Look for patterns. Focus on what makes you feel better.
As Howe tells patients, take a personalized approach and avoid unnecessary restrictions. This can make a meaningful difference in how you feel and your quality of life. It’s also important to know that a low histamine diet isn’t appropriate for everyone and should be tailored to your individual needs.
With the right support and some planning, you can eat healthy and feel better at the same time.
Have questions about the low histamine diet? Talk to a Banner Health provider or nutrition specialist. They can help you create a diet plan that works for you.
