Best Natural Antihistamines for Histamine Intolerance
Histamine release causes allergic symptoms like runny nose, watery eyes, and skin rashes which is a normal immune response to allergens.
That is why we reach for antihistamines like Benadryl and Zyrtec. But maybe we should be looking at what we are eating or perhaps foods that are natural antihistamines.
Histamine is released as a natural immune response to help protect the body and as an excitatory neurotransmitter (brain chemical) to give us that get and go feeling.
Because histamine has many different roles in our bodies, high histamine symptoms can be extremely varied.
- Migraines, Headaches
- Brain Fog
- IBS – Both Constipation & Diarrhea
- PMS – Estrogen Imbalances
- Thyroid Dysfunction
- Nerve & Muscle Pain
- Allergic Symptoms
- Autoimmune Flares – Hashimoto's, Psoriasis
We can also get histamine from our diet from foods that are high in histamine like fermented foods.
If we develop histamine intolerance or the inability to manage histamine levels, this can increase histamine levels and the symptoms of histamine intolerance.
What is Histamine Intolerance?
Histamine intolerance is a food intolerance that is becoming increasingly more common.
Like most food intolerances, it involves a lack of enzymes that help to breakdown compounds like lactose (milk sugar) and histamine from foods.
For instance, with lactose intolerance, the symptoms usually involve digestive issues like diarrhea and gas.
Digestive disturbances with lactose intolerance are due to a lack of an enzyme called lactase.
Most food intolerances, once identified, can easily be managed by avoiding certain foods. Or, we can supplement with digestive enzymes like lactase.
What makes histamine intolerance more challenging to manage is the fact that our bodies produce histamine. And, almost all foods contain some level of histamine. There is no such thing as a “histamine-free diet.”
We become intolerant to histamine when we cannot correctly manage histamine levels, including lack of particular enzymes, poor gut health, nutrient deficiencies, and genetics.
Can Antihistamine Medications Help Reduce Symptoms of Histamine Intolerance?
Since I have struggled with histamine intolerance, I would love to say yes. Popping a Claritin would be a lot easier than always avoiding foods high in histamine that I love, like wine and fermented foods.
But I am afraid that in most cases, medications like Benadryl won't work to reduce histamine intolerance symptoms, especially migraines and headaches.
Antihistamine medications act by blocking the cell receptors' response to histamine. The target of these medications is predominately targeting our immune response to allergens.
So, it will help with an allergic reaction but not for other symptoms of histamine intolerance like headaches, IBS, and anxiety.
What are Natural Antihistamines and Do They Work?
Many natural antihistamines reduce histamine by either reducing inflammation or by blocking histamine production from the mast cells.
Chronic inflammation increases the release of histamine and is a significant contributor to histamine intolerance.
Therefore an anti-inflammatory diet like the Mediterranean Diet can be very effective at reducing histamine levels.
Other natural antihistamines help support DAO production, the key enzyme that blocks histamine absorption from our food and degrades histamine.
Foods Rich Polyphenols Reduces Inflammation & Histamine
Some of the foods rich in polyphenols or bioactives are not just anti-inflammatory; they reduce histamine production, acting as a natural antihistamine.
One study found that watercress, a cruciferous vegetable, inhibited up to 60% of histamines released. Watercress is very rich in vitamins and compounds that significantly inhibited histamine release.
Watercress is challenging to find in the grocery store and very seasonal. Would other cruciferous vegetables like broccoli and cauliflower have the same antihistamine qualities?
Considering that cruciferous vegetables are high in bioactives, I would bet that they are a natural antihistamine.
Other foods, herbs, and spices that have been shown to have antihistamine qualities are:
- Moringa – A SuperFood
- Chamomile Tea or Supplement
- Ginger, Galangal (Tai ginger)
- Apples, Peaches
- Brazil Nuts – Due to their high selenium content.
Vitamin C as Supplement is a Powerful Antihistamine
Besides vitamin B6, vitamin C is vital to DAO production (diamine oxidase), the enzyme that degrades histamine.
DAO also blocks the absorption of histamine from our food in our gut. Numerous studies have shown that supplementing with vitamin C is a powerful antihistamine.
Supplementing with vitamin C does come with challenges, however.
Using vitamin C as an antihistamine requires larger dosages, upwards of 2000 mg. per day, to be effective. This large dosage can cause digestive disturbances like diarrhea, gas, and heartburn.
You can also use vitamin C that has added minerals like this one, which reduces these negative side effects.
Taking it throughout the day also will reduce heartburn or stomach upset from this large of a dosage.
When Not to Supplement With Vitamin C as An Antihistamine
Besides causing digestive disturbances, vitamin C in large dosage can cause oxalate toxicity. Oxalate toxicity can lead to kidney stones, nerve and muscle pain, as well as joint pain.
We absorb oxalates from our food, and the body produces oxalates. Vitamin C is one of the vital nutrients that are needed to make oxalates.
Several studies have shown that supplementing with vitamin C can lead to oxalate toxicity.
Also, vitamin C can lead to iron toxicity. Vitamin C increases the absorption of iron from our food which is excellent if you are iron anemic.
But if you are not, then you could absorb too much iron leading to oxidative stress and chronic inflammation from too much iron. And, this will increase your histamine levels.
Quercetin and Stinging Nettle – Can They Replace Antihistamine Medications?
Quercetin is a polyphenol found in many foods, with one of the rich sources from the Allium or onion family. Foods like green onions, garlic, leeks, yellow onions, and red onions are rich in quercetin.
But you would have to consume a large amount of these foods to have the same effect as an antihistamine medication.
Stinging nettle is a common medicinal herb found in teas and supplements and is a potent antihistamine.
As seen with HistaEze by Designs for Health, combining quercetin, stinging nettle, and vitamin C is a powerful natural antihistamine. With a lower vitamin C dosage, you are less likely to experience vitamin C's adverse side effects.
Taking quercetin alone can work as an antihistamine; however, large dosages of quercetin from supplement form can lead to high anxiety and lack of focus in people with the reduced COMT gene variant.
Since I have reduced COMT and histamine intolerance, I have tried high dosage quercetin and did experience increased anxiety and lack of focus.
In my case, quercetin as a supplement does not work well for me as an antihistamine. Just another good reason to do genomic testing to discover what works for you!
Could Fiber be a Natural Antihistamine?
Allergies and histamine intolerance have become more prevalent while the Western diet has become very low in fiber-rich foods. Could there be a connection?
A recent study determined if fiber-rich foods and the metabolites produced in the gut from fiber reduced histamine levels.
They found that specific fibers, including resistant starch, helped regulate mast cells and reduce histamine levels! What is resistant starch? Download my guide to resistant starch.
Fiber also helps produce anti-inflammatory compounds like butyrate that reduce inflammation in the gut and help resolve IBS and IBD.
Whereas fiber in itself cannot act as an antihistamine, it does help regulate mast cell release of histamine.
It is not uncommon for my clients to have IBS, histamine intolerance, and allergies.
Resolving their digestion conditions helps overcome their histamine intolerance, allowing them to enjoy fermented foods, cheese, and even wine!
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- The Role of Histamine and Histamine Receptors in Mast Cell-Medicated Allergy and Inflammation: The Hunt for New Therapeutic Targets, Thangam, et al, August 2018
- Mast Cell Stabilizing Foods – The Insitute of Functional Medicine
- Effect of Dietary Fiber and Metabolites on Mast Cell Activation and Mast Cell-Associated Diseases, Folkerts, et al, May 2018
- Mast Cells and Irritable Bowel Syndrome: From the Bench to the Bedside, Zhang, et al, April 2016