High histamine levels are caused by consuming too many histamine-rich foods, reduced ability to break it down (DAO enzyme deficiency), gut dysbiosis, certain medications, allergies, or mast cell issues like MCAS, all leading to histamine buildup from diet, microbes, or overactive immune cells overwhelming the body's systems.
Some foods contain large amounts of histamine. These include foods that involve an aging or fermentation process like wine, beer and cheeses. Other foods can cause your mast cells to release histamine (histamine liberators). Both of these types of foods can cause excess amounts of histamine in your body.
To clear histamine, focus on a low-histamine diet (fresh, unprocessed foods), manage stress, get quality sleep, stay hydrated, and consider supplements like DAO or quercetin with medical guidance, as histamine is a natural body chemical, not something to "flush out" but rather to manage through diet and lifestyle to reduce overload.
Medical Conditions
Autoimmune disorders affect immune system function, which might lead to more histamine being released (11). Another condition causing elevated histamine levels is mastocytosis, rare disorder involving abnormal mast cell growth—the cells that make and store histamine (12).
It is also possible to develop asthma-like symptoms such as wheezing, shortness of breath, or bronchoconstriction (narrowing of breathing passages). Cardiovascular: In some cases histamine intolerance can cause low blood pressure that can in turn dizziness or fatigue.
High histamine levels are often caused by a deficiency in the enzyme DAO, which helps to break down histamine.
Under your skin. Near blood vessels and lymph vessels. In nerves. In your lungs and intestines.
Mast cell activation syndrome (MCAS) develops when mast cells become overactive and release their contents, which include histamine and other substances that cause inflammation and allergy symptoms.
Yes, magnesium helps regulate mast cell activity and can reduce histamine release. Does B12 stabilize mast cells? Yes, vitamin B12 supports nervous system health and may help stabilize mast cells, especially in MCAS patients with neurological symptoms.
Many people believe they experience a “histamine dump.” This phenomenon usually happens at night when your body releases a sudden surge of histamine. A histamine dump can interrupt your sleep and cause headaches, flushing, itching, anxiety, and a racing heart.
Vitamin C. Vitamin C is a very common and well-known nutrient to strengthen the immune system and reduce inflammation. Vitamin C is also required to produce the necessary enzymes for the process of histamine breakdown, making it a vital anti-histamine nutrient.
Individuals with histamine intolerance often present with a constellation of neuropsychiatric symptoms, including:
Even if a food is not high in histamine itself, it may trigger our mast cells to release histamine. Such histamine liberators include kiwi fruit, strawberries, bananas, papaya, citrus fruits and pineapple as well as food additives like carrageenan.
When your estrogen levels rise, you release more of your own histamine. Histamine then stimulates your ovaries to release more estrogen - thus setting off a vicious cycle. In addition, estrogen stops your DAO from working well. If you are intolerant to histamine, you will not tolerate your own estrogen very well.
High histamine levels can cause allergy-like symptoms, including stuffy or runny nose, headaches, stomach upset, and low blood pressure.
There is currently no cure for histamine intolerance. The key to success is for the patient to learn to adjust to a low-histamine diet and manage the condition(s) until it either goes away, or for life.
Vitamin B12 supports the methylation process—a biochemical pathway that helps the body detoxify and regulate histamine levels. When B12 is lacking, methylation slows down, leading to higher histamine concentrations in the blood.
Very high doses of magnesium can lead to magnesium toxicity, which can cause hypotension, vomiting, difficulty breathing, irregular heartbeat, cardiac arrest, and other signs and symptoms. A few cases of fatal hypermagnesemia have been reported.
Try not to drink alcohol while taking an antihistamine, particularly if it's a type that makes you drowsy, as it can increase the chances of it making you feel sleepy. Food and other drinks do not affect most antihistamines, but check the leaflet that comes with your medicine to make sure.
People with mastocytosis have an increased risk of developing a severe and life-threatening allergic reaction. This is known as anaphylaxis. The increased risk of anaphylaxis is caused by the abnormally high number of mast cells and their potential to release large amounts of histamine into the blood.
The "worst" autoimmune diseases are subjective but often ranked by severity, impact on life expectancy, and organ damage, with top contenders including Giant Cell Myocarditis (deadly heart inflammation), Vasculitis (blood vessel inflammation like GPA), Systemic Lupus Erythematosus (multi-organ attacks), Multiple Sclerosis (nervous system damage), and Type 1 Diabetes (pancreas destruction). These conditions can severely affect quality of life, cause permanent disability, and reduce lifespan if not managed effectively, though rare ones like Giant Cell Myocarditis are acutely fatal.
Histamine intolerance (HIT) is assumed to be due to a deficiency of the gastrointestinal (GI) enzyme diamine oxidase (DAO) and, therefore, the food component histamine not being degraded and/or absorbed properly within the GI tract.
All available evidence from several species shows that histaminergic neurons, when activated, increase wakefulness and induce electrographic arousal. The H1 receptor in the ventrolateral hypothalamus is one important site for this effect [31], but actions on the thalamus and cerebral cortex may also be significant.
So if you suffer from histamine intolerance, you should prefer calmer sports such as strength training, Pilates or yoga. Interesting fact: Cardio training releases histamine and other inflammation substances, but the effect only takes temporary (up to 72 hours).
Covid‐19 Histamine theory explain clinical presentations of the disease as a result of Histamine activated pathways to a greater extent. It is basically activation of histamine pathways which lead to cytokine storm in Covid‐19 pathogenesis 4 and other related complications.