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  1. Foods High in Histamine & Why You Should Avoid Them - WebMD

    May 22, 2024 · Histamine is chemical released by your immune system in response to potential allergens, but too much of it leads to coughing, wheezing, & watery eyes.

  2. What Is Histamine? - Cleveland Clinic

    Mar 28, 2023 · Histamine is a signaling chemical your immune system releases to send messages between different cells. Histamine has several functions, but it’s mainly known for …

  3. What Is Histamine and What Is Its Role in the Body? - Healthline

    Oct 2, 2023 · Histamine is a chemical that your body produces, playing a vital role in immune responses, particularly those related to allergies, and also influencing the gut, brain, and …

  4. Histamine - Wikipedia

    Histamine is a monoamine neurotransmitter. Histamine is derived from the decarboxylation of the amino acid histidine, a reaction catalyzed by the enzyme L -histidine decarboxylase. It is a …

  5. Histamine: Function, Overreaction, and Treatment - Healthgrades

    Jun 10, 2022 · Histamine is one of the chemicals involved in defending the body against allergens. Mast cells and basophils produce most of the histamine in your immune system. …

  6. Histamine | Description & Facts | Britannica

    Oct 13, 2025 · Histamine is chemically classified as an amine, an organic molecule based on the structure of ammonia (NH 3). It is formed by the decarboxylation (the removal of a carboxyl …

  7. What is Histamine? What They Do and Foods To Avoid 2025

    May 9, 2025 · Histamines are molecules produced by certain cells in the body, such as mast cells, that play an important role in the immune system response. When you encounter an allergen …

  8. Histamine: Function, Reactions and Side Effects - Medicover …

    Oct 4, 2024 · Histamine is an organic nitrogenous compound involved in local immune responses, regulating physiological functions in the gut, and acting as a neurotransmitter.

  9. What is Histamine? Role in Allergic Reactions Explained

    The answer lies in a cascade of signals in your immune system, and one of them is histamine. Histamine is a chemical that is released by white blood cells in your body when your immune …

  10. What Is Histamine? - Everyday Health

    Oct 10, 2023 · When histamine is released, it acts on the eyes, throat, lungs, nose, skin, or gastrointestinal tract, according to Nemours. The chemical can cause allergy symptoms, such …