Keto Extra Strength the white blood cells of the immune system begin producing antibodies to fight against substances that compromise body integrity. These antibodies, called immunoglobulin E or IgE, are stored on special cells called mast cells. When the antibodies come in contact with the appropriate antigen, they release the chemical - histamine.Causes of hay fever - plant pollenThe most common allergens that cause hay fever are pollen. Pollen are small particles released by flowering plants. Then they travel through the wind to other plants of the same species for fertilization. That's when they come across an allergic person and an allergic reaction occurs.Nettle and mugwort are one of the stronger allergens. The pollen concentration of these plants is particularly high from the second half of June to the end of August
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