Histamine is a biogenic amine, which widely exists in human tissues. When the body is subjected to physical and chemical stimulation, cells containing histamine will be degranulated, resulting in the release of histamine, which will combine with histamine receptors on target cells to produce biological effects, including telangiectasia, blood pressure drop, bronchospasm, headache, diarrhea, rash and a series of allergic symptoms.
In addition to histamine from the body, some foods also contain histamine. The main source of histamine in food is fish, which is produced by histidine decarboxylase secreted by bacteria degrading free histidine in fish. Rich in free histidine, there are histamine-producing microorganisms, which are easy to produce histamine under suitable conditions and belong to high histamine fish.
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