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Histamine
Histamine is a bioactive compound derived from the amino acid histidine and plays key roles in immune defence, stomach acid secretion, and inflammatory responses. In the bloodstream, histamine reflects both mast cell activity and the body’s ability to break down histamine through enzymes such as DAO and HNMT. Elevated histamine levels may indicate immune activation, an allergic reaction, or a reduced capacity to metabolise histamine. Low or balanced histamine concentrations suggest normal regulation of histamine metabolism and immune function.
Description
What are possible symptoms of raised histamine levels?
High histamine levels can be associated with symptoms such as headaches, nasal congestion, skin flushing, hives, digestive discomfort, or anxiety. In some people, excess histamine may imitate allergic reactions even without an allergen being present.
Who might benefit from having a histamine test?
Testing histamine can be useful for individuals experiencing unexplained allergy-like symptoms, chronic inflammation, migraines, digestive problems, or fatigue. It can also assist in assessing histamine intolerance or mast cell activation when symptoms persist and triggers are unclear.
What factors can affect histamine levels?
Histamine levels are influenced by immune activation, gut health, DAO (diamine oxidase) enzyme activity, and overall methylation capacity. Certain foods, alcohol, stress, or gut dysbiosis can also contribute to histamine build-up.
Is it possible to balance histamine levels?
In many cases, yes. Supporting gut and liver health, reducing inflammation, and limiting high-histamine foods can help maintain healthy histamine metabolism. Adequate intake of nutrients such as vitamin C, B6, copper, and folate supports the enzymes that break down histamine.
