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</html><thumbnail_url>https://www.intoleran.com/en/wp-content/uploads/2026/02/Minder-aarbeien-op-de-plank-scaled.jpg</thumbnail_url><thumbnail_width>2560</thumbnail_width><thumbnail_height>1383</thumbnail_height><description>Histamine is a substance produced by the body. It helps transmit signals between cells and also plays an important role in the immune system. Histamine is stored in special cells called mast cells. These cells are found throughout the body, including in the skin, airways and intestines..&nbsp; The body&#x2019;s own production of histamine The body [&hellip;]</description></oembed>