👉 Histamines, also known as histamine H1 receptors, are a group of chemicals that are released by the body's immune system to fight off an allergic reaction. Histamine is produced by various types of cells in the body, including mast cells and basophils. When these cells come into contact with a foreign substance or allergen, such as pollen or dust, they release histamines in response. Histamines can cause a range of symptoms, including sneezing, runny nose,
