Histamine is a chemical produced by the immune system. It plays a role in eliminating allergens, such as pollen, pets, and dust, which trigger allergic reactions. Although these substances are not inherently threatening, the immune system perceives them as threats and reacts accordingly.

When our body detects an allergen, the immune system initiates a chain reaction for defense. It sends chemical signals to 'mast cells' (also known as fat cells) in the skin, lungs, nose, mouth, intestines, and blood, instructing them to release histamine.

The release of histamine increases blood flow to the affected area, causing inflammation and prompting the secretion of other immune chemicals for healing. Histamine binds to receptors, and if the affected area is the nose, it can stimulate the thin mucous membranes to produce more mucus, leading to nasal congestion and runny nose, and causing sneezing. If the throat is affected, it can cause coughing, and the eyes and nose may become irritated.

Ingesting foods that should be avoided can trigger an allergic reaction in the intestines due to histamine. Some foods naturally contain high levels of histamine, which can exacerbate allergic reactions. People with histamine intolerance are particularly sensitive to foods high in histamine. Foods rich in histamine include aged cheeses, wine and other fermented (stored for a long time) foods, beer, pork, sausages, smoked processed meats, oranges, spinach, peanuts, and certain bluefish (tuna, mackerel, Spanish mackerel, and saury, which can produce large amounts of histamine if left at room temperature or handled carelessly).

Eating fresh foods rather than stored, processed, or aged foods can be healthier. Managing stress is also important as it can promote the secretion of histamine. Meditation, yoga, and regular exercise can help reduce stress.

Histamine plays a crucial role in our body's immune and inflammatory responses, but if it is overproduced or not properly regulated, it can cause various side effects. Therefore, maintaining a balance of histamine is important.

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