Have you Heard of Histamine Intolerance?

Today’s topic: Histamine.


As much as I love working with my patients….I also, truly love to spend time learning.  It’s not unusual for me to print out 3-4 research articles, hop into bed at night with my highlighter and do some light reading. 🙂 Ha!

When I was writing my Complete Idiot’s Guide to Eating Well with IBS back in 2009, I included a few sentences introducing histamine intolerance to my readers. I find this condition very interesting ….and I am convinced it’s more common than it is diagnosed. I personally am on a mission to learn more and as always…share what I learn.

Disclaimer:  I don’t want every person with IBS that follows my blog to feel the need to remove all histamine from their diet! Nor do I want you to feel overwhelmed by this complicated topic I am about to embark on.  I do know that some people that follow my blog may very well have histamine intolerance. For this small subset of folks, the goal is to enlighten you to get the help you need.

What is histamine? Histamine is a natural substance, a biogenic (meaning: resulting from the activity of living organisms such as, fermentation) amine that is present in many foods and produced by a small subset of human cells, including mast cells, basophils, platelets, histaminergic neurons and enterochromaffine cells. Wow! That is a mouthful!  

Histamine is a neurotransmitter (brain chemicals that communicate information throughout our brain and body) produced in an allergic reaction, often associated with causing itching, redness, swelling, cough or rash. Histamine regulates sleep and also aids in digestion by playing a role in stomach acid secretion.

What is histamine intolerance?  Histamine intolerance results from an accumulation of histamine and the inability of the body to completely degrade it. In healthy people, dietary histamine can be rapidly detoxified by enzymes called amine oxidases, particularly, Diamine Oxidase (DAO) enzyme.  Some individuals have low levels of these enzymes; therefore, are at greater risk for histamine toxicity.  Gastrointestinal diseases can contribute to a decline in these histamine degrading enzymes.

Similar to FODMAPs, histamine can have a  cumulative effect on symptoms. Small amounts may be tolerated but multiple sources of histamine in the diet will ‘fill your personal threshold bucket’ and symptoms will ensue.  In order to assess if histamine is a problem for you, it is necessary to restrict all of the histamine-associated foods.  A food intake and symptom log are essential while undergoing both the elimination and the re-introduction phase of histamine foods.  Working with a dietitian knowledgeable in the low histamine diet is key.  Food lists for histamine are variable online.  It is my understanding that this in part is due to the fact that analysis of histamine in food has not been done for decades.  Another area of needed research!

Symptoms of histamine intolerance:

  • Diarrhea
  • Headache
  • Flushing
  • Rash/Urticaria (hives)/eczema
  • Arrhythmia (irregular heart beat)
  • Low blood pressure-due to vasodilation caused by the histamine
  • Wheezing
  • Runny nose
  • Watery eyes
  • Angioedema-swelling of face/hands/lips
  • Heartburn-due to increased acid production
  • Itching- typically of the skin
  • Abdominal Pain

The ingestion of histamine-rich food or of alcohol or drugs that release histamine or block DAO may provoke allergic-like symptoms in patients with histamine intolerance. Symptoms can be reduced by a low histamine diet and/or managed by antihistamine medications.

Do I think all patient’s with IBS have histamine intolerance? NO! But… histamine intolerance can contribute to abdominal pain, diarrhea, and heartburn–certainly common IBS symptoms, for some people.  Dr. William Chey, MD, Professor of Medicine, Director of the GI Physiology Laboratory, and Co-Director of the Michigan Bowel Control Program at the University of Michigan weighs in on this discussion, “Anyone who has hay fever already knows that histamine plays an important role in allergic responses caused by things like pollen and animal dander – many popular medications like Benadryl and Claritin block the effects of histamine. The fact that some foods contain histamine has been largely overlooked. It is quite plausible that consuming foods which contain large amounts of histamine or stimulate the release of histamine from cells in the gut could cause GI symptoms in some people.”

Unfortunately, we don’t have a definitive (accurate) test to determine DAO enzyme levels or their functioning capacity or histamine levels, at this time. If you present with 2 or more of the common symptoms of histamine intolerance, improve on a histamine free or low histamine diet and anti-histamine medications, you fit the criteria for having histamine intolerance.  A more severe disease state, an occult systemic mastocytosis should be excluded as your diagnosis by measurement of serum tryptase.  This is a condition in which a person has abnormally high amounts of mast cells.  You don’t need to have mastocytosis to have histamine intolerance.

Histamine and Food: High concentrations of histamine are found in products of fermentation such as aged cheeses, sauerkraut, wine, processed meats and  canned fish. Vegetables such as spinach, eggplant have histamine too.  In addition to histamine containing foods which I have provided only a partial list, there are foods that have the capacity to release histamine. Foods that have been linked with histamine release include: citrus fruit, papaya, strawberries, pineapple, nuts, peanuts, tomatoes, spinach, chocolate, fish, pork, egg whites and additives and spices.

Alcohol is not only rich in histamine but also inhibits the DAO enzyme to help degrade histamine.

Drugs that release histamine or inhibit diamine oxidase (DAO) can be found in this reference, in TABLE 5 which is also cited below.  Some medications included in this list are metoclopramide (reglan) and Cimetidine.

Update March 22, 2019, this area of science is still in its infancy. For instance, the medication amitryptaline is on the above list, but other studies (in animals) have shown that amitryptaline may help enhance the degradation or the reduction of histamine.

Here are some general tips to minimize histamine in diet:

  • Avoid or reduce eating canned foods.
  • Avoid or reduce eating overly ripened and/or fermented foods (aged cheeses, alcoholic drinks, products containing yeast, stale fish)
  • Histamine levels in foods vary, depending on how ripe, matured the foods are–with higher levels the more ripe or aged.
  • As much as it is possible, only buy and eat fresh food.
  • Don’t allow foods to linger outside the refrigerator – especially meat products or eat left-overs.
  • Choose fresh (not aged) meats, fresh white fish or choose those that have been flash frozen.
  • Consult a registered dietitian knowledgeable in histamine to help manage your diet modifications and help you balance your diet

If you are a health care professional or pretty savvy with medical jargon, check out this review article about histamine intolerance.

Could alterations in our gut bacteria play a role in histamine intolerance?

Um, yes.  Gut bacteria are capable of producing histamine. Little microorganisms in our intestine can produce histidine decarboxylase—converting protein in our gut to histamine. Amy Burkhart, MD, RD, an integrative medicine practitioner in Napa, California notes,”Though its benefits are controversial, I have had patients with dysbiosis/small intestinal bacterial overgrowth experience improvement on a low histamine diet. The low histamine diet is challenging and not necessary for all dysbiosis patients but can be beneficial in selected cases. Once the dysbiosis improves the tolerance to histamine containing foods also tends to improve.”

For further information on histamine containing food lists and research on this condition, here are some articles/resources/references for you to check out:

The Histamine Chef  Great site for all sorts of information written by a journalist–with many research articles provided and expert interviews.  Check out the interview with expert Dr. Janice Jonega

Dr. Janice Jonega’s site and fact sheet on histamine intolerance.

Amy Burkhart’s site (Amy is an MD and RD)  with a great article on histamine here.

Royal Prince Alfred Hospital Allergy Unit has some good resources on food intolerances (Sydney, Australia hospital)

Am J Clin Nutr 2007; 85:1185-96 Histamine and histamine intolerance  Excellent review article!

And if you lasted this long….Yay! You have a chance to win one of my latest products! A FODMAPer tote!! Now for sale on my website here!  For a chance to win,  simply leave the comment: #fodmaper  and I will select one random winner soon!

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43 replies on “Have you Heard of Histamine Intolerance?

  • dkaj

    Hi Kate,
    Thank you so much for dedicating one of your posts to Histamine Intolerance. I definitely think in our situation histamines is another contributing factors for my dd’s GI symptoms. And yes, we have histamine issues on both sides of the family also. It’s definitely hard navigating between fodmaps and histamines, but the knowledge allows a person to make choices to help themselves and/or their loved ones and is definitely worth GOLD!! PS. I’ve been following the Low Histamine Chef site for about a year also. Love her info. Thanks again Kate for getting the word out. PSS. Has Monash or anyone else looked into malted flours and extracts. Malted anything is fermented. I’ve got my eye on this ingredient. Definitely a bloating factor for my dd. Almost all commercial white wheat flours and breads have it added to them. Just adds fuel to the fire when it’s the second ingredient in almost every commercial bread and almost every single flour on the market. Only flour I’ve been able to find so far is Hodgson’s Mills unbleached white flour without malted barley flour added to it. It’s unbleached, unbromated and unenriched. No malted anything added. Keep researching!!! We love your posts.

  • Melissa

    Thanks SO much for this in-depth post! Appreciate the food for thought (pun intended!). You mentioned histamine intolerance in a blog post right before Christmas. I was intrigued and went on a scavenger hunt for similar late-night reading. 🙂 I’m a writer, life-long learner, #fodmaper and perhaps histamine intolerant as well? I have 12 of the 13 symptoms listed.

    I’m attempting to transition to a combined low-fodmap and low-histamine diet, and it’s rough. I would love to hear your thoughts on foods that work for both diets and snacks that won’t lead to a blood sugar crash after 1 or 2 hours. Getting enough protein is hard (milk & eggs are no-goes for me due to allergies). Most nuts bother me, as does quinoa.

    Thanks for your work, Kate! Seriously, you have changed my life. The low-fodmap diet did indeed clear some of the weeds for me, and I’m hopeful that a low-histamine could be the final piece of the puzzle in a decades-long health struggle.

    • katescarlata

      Can you do fresh chicken and/or fresh white fish or flash frozen white fish for protein? When I do a combo low histamine and low FODMAP diet–I often just pull out the very high histamine foods –this is often enough. Get help from a knowledgeable dietitian.

  • Alyssa Cohen

    Thank you so much for all of your information. I am almost 2 years in for being a low FODMAPer, and it has changed my belly! I still feel like the whole puzzle may not be figured out, though, so the idea of low histamines is really interesting to me. I recently have been having strange swollen, really uncomfortable lips since August, so who knows?!

    Thanks again!!
    Alyssa 🙂

    • Donna

      Interesting about the different kinds of microbes. It must be so difficult working with people with IBS because everyone’s issues are different. Thanks for replying and for giving this problem so much necessary attention.
      Alyssa, could it be that you increased your intake of nuts like walnut, macadamia, pecans, etc.? That happened to me when I replaced some other foods with nuts. OK with almonds and peanuts but the others cause the symptom you described as well as mouth sores and little painful bumps around my face but mostly around the mouth.

  • Jenn


    Almost a decade ago I was diagnosed as having Carcinoid Syndrome based on symptoms and a couple of labs that indicated it, then later did not. Since we couldn’t find the cause, we chalked it up to me being younger than the usual discovery age and I’ve been monitored for it ever since. They also floated mastocytosis as a possible cause, especially of the flushing, but since ruling that out required a bone marrow biopsy, we decided to wait and see on that one!

    In researched triggers, etc. for the various parts of the syndrome and after a particularly scary bout of arrhythmia with no other apparent cause (per the cardiologist), I attempted to alleviate the symptoms by avoiding tyramine-rich foods for many years, many of which coincide with the histamine-rich foods above (aged/fermented anything, tomatoes, etc.) and, around the time things started getting better, I also went on a daily antihistamine to try to rein in some constant sinus issues. Finding out about FODMAPs 2 years ago alleviated a lot of the GI symptoms, of course, so now I’m wondering if it’s the Histamine to blame and not some hidden little neuroendocrine tumor!

    Not that I’m looking to restrict my diet further, but it’s definitely something I’ll bring up to my endocrinologist (appointment next week, and he’d already ordered Histamine labs… coincidence or synchronicity at work?). Thanks for the food for thought!


  • ANNA

    I’ve got gut problems (permeability… )the doctor recommended me a Low Fodmap diet but I have histamine intolerance… also egg and milk intolerance..it’s difficult to know what to eat, there are not so many things to chose in my case 🙁

    Sorry for my english!!!!

    😀 thanks for all the information that you share <3

  • Deirdre Lawlor


    Thanks for the information. I ended up in hospital due to Angioderma of the face and neck and no cause could be found.

  • Melissa

    Hmmm…. that is really interesting. I have several of those symptoms and now feel really overwhelmed as to what I should/should not be eating. I wish there were more GI doctors where I live that are versed in IBS, FODMAPs and this subject.

    • katescarlata

      Melissa, please don’t feel overwhelmed! Perhaps,try low FODMAP first and see how you make out. Reintroduce FODMAPs in the re-challenge phase. Then maybe, if you don’t feel well enough–consider histamine as part of your picture.

  • Alix

    Hi Kate, I’ve had digestion problems for about 12 years, lots of tests, cutting out more and more foods and getting more and more miserable and hopeless. Finally found a wonderful gastro-enterologist, dr wilder-smith, in bern Switzerland (where I live) who took me seriously, did some testing and suggested histamine intolerance. I now take one small tablet (called Zanitec here) before supper each evening and am almost symptom free. I am careful with processed foods and onions and garlic but otherwise I feel better and happier than I have for ages and my energy is coming back. i strongly recommend following up the possibility of histamine intolerance for people who
    Have a long term seemingly insoluble digestive problem. Thanks for all your hard work! Alix

  • Judy Ahlstrom

    Hi Kate,

    Would you please write about fructose intolerance? I have that along with IBS and I am having trouble combining the fructose free diet with the FODMAP diet. I have gotten confused and am not currently working with a dietitian. Last year the Dr, had me try the FODMAP diet and the dietitian tossed my FI diet. No mention was made to modify. I ordered your cookbook and see you make mention of modifying the diet if you have FI. That could make my life better. Thanks

  • Donna

    Oh, Kate 🙁 Say it ain’t so! Spinach? One of the few FODMAP veggie friends? And eggplant? Ditto on needing more fructose info. Blueberries and strawberries should be OK but still seem to be an issue. Do we know which gas – methane or hydrogen – fructose causes?

    • katescarlata

      No need to modify spinach and eggplant if you don’t suspect histamine is a major issue for you!! Okay…will work on a good detailed fructose post! No we don’t believe we know what gas fructose causes–depends on what microbes we have. Some people don’t have methane producing microbes and some people don’t have hydrogen producing.

      • Donna

        Interesting about the different kinds of microbes. It must be so difficult working with people with IBS because everyone’s issues are different. Thanks for replying and for giving this problem so much necessary attention.

  • cheryl

    Hi Kate,
    I have had a huge histamine problem for years. My anger at all of the MD’s who refused to diagnosis and treat my illness.
    The hives became dangerous and no treatment nor acknowledgment of any problems on foods, environment nor toxins. Having taken the MRT blood test and eliminating my food and chemical sensitivities has only unmask my histamine problem. I fear now with all of the high histamine foods, my sensitivies that my total nutrient intake is is in trouble.
    Have you posted any tie in with histamine intolerance that includes a tyramine intolerance also? Which adds more deprivation and less nutrient dense food choices. Cooking fresh each meal for each family member is a huge burden at times. No left-overs, no cooking ahead, no ferments, no gut healing foods. If you have further research I would appreciate it so much.
    Each puzzle piece leads to more restrictions. Healing is what I need.

  • Suzanne Perazzini

    It is rather concerning that many of the foods that need to be eliminated are okay on the low Fodmap diet. As Cara above said, “What is there left to eat?” Quite a conundrum!

    • katescarlata

      Hi Suzanne, I think it is very important to NOT to attempt to do multiple elimination diets at once! This would place anyone at nutritional risk and further impact the functioning of the GI tract. Working together with a dietitian is essential when you can not quite find symptom relief from the low FODMAP diet alone. The low FODMAP diet is estimated to help 3 out of 4 people with IBS. For the 25% that do not benefit–I think it’s important to look for other potential issues. If “plan A” is not working to your satisfaction, keeping looking for alternative plans.

  • Wendy


    I have a friend with suspected histamine intolerance….can’t wait to forward this blog post to her.

    and love your tote!

  • Jewel Holmberg


    As I’ve told my family and friends, Kate, your blog and Web site are the only information I trust! I do plan to download the Monash U app to an iPad but haven’t gotten around to it yet. I’ve almost finished two weeks on the low FODMAP diet. It’s been a bit tricky, but any “cheating” has been an accident/oversight and has been minimal. I’m committed to following the elimination diet as closely as possible. With IBS-C, I don’t anticipate improvement for a few more weeks at minimum. I think I’ll see this through 6 weeks and then consider histamine intolerance because I know I have allergies and I do have most of the symptoms listed (but I realize that those are symptoms of many other conditions, too). Thanks for all of the helpful info!

  • Ashley


    Several of my children and I have autoimmune diseases and several GI issues. We are all on a daily antihistimine pill… Ugh, with gluten, soy, lactose intollerances and the foods said to avoid with our health issues, I am wondering what Can we eat? All the foods said to heal our gut tract killllllll my IBS! I am on a Whole30 challenge right now and I swear it sounds like whales are singing in my abdomen. Sigh*.

  • Kate Watson

    Hi Kate,

    I’m so glad you enjoy reading research papers, better you than me 🙂 I read all of your posts and always find them so informative and helpful. I tell every Fodmaper about your blog because I think it’s an essential resource for all of us living this lifestyle.
    Thanks so much for writing about this topic as I think it’s a really important one that isn’t well understood yet! Some light bulbs definitely went off for me reading this in thinking about my own health issues.

  • Simon Gaus

    Hi guys,
    well I’m sensitive to histamine and I always had this weird headache. Sometimes I hate it to go out because I didn’t know for sure whats in the meal. I recognized that I couldn’t eat tomatos and certain kind of cheese too.

    Two month ago I found this dietary supplement called Daosin. It’s checking you histamine level within your body and stopps the allergic reaction if your histamine level rises. For me that means no more headache.

    Pretty happy with it, maybe some guys of you can use it as well.

    Best regards

    • cheryl

      So where does one buy or try Dosin? And is it pork based, does it contain corn? With so many food and chemical sensitivities I need to know what is in this product?
      Thanks and so happy you have found a solution.

  • cheryl

    Wow and wow and wow!
    I just found Janice Joneja, and was amazed at the intricate workings of histamines, tyramine, and benzoic acid.
    Your post always brings….knowledge, thoughtfulness and hope!

    Now no canned foods, another hurtle!

  • susiefruitcake

    Hi Kate – Thank you so much for sharing this. I love to learn too though I shan’t pretend to have understood it all (yet).

    You have got me wondering though. I normally suffer badly with hay-fever from June onwards, but last year was the first year I haven’t had a problem with it and also my first year on a low FODMAP diet. I wondered if this was just coincidence, but would love to know what you think?

Comments are closed.