Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Histamine N-methyltransferase (HNMT) is a key enzyme that breaks down histamine by adding methyl groups, using S-adenosyl methionine as a cofactor. This enzyme regulates histamine levels in the brain and peripheral tissues, helping control allergic reactions and neurotransmitter balance.
Reported Benefits (Provisional)
Origin & History
Histamine N-Methyltransferase (HNMT) is an enzyme found in the liver and kidneys, responsible for the methylation and inactivation of histamine. It is naturally occurring in the body and studied for its role in histamine metabolism.
Research Narrative (Provisional)
Research includes genetic studies and in vitro studies examining HNMT's role in histamine metabolism and its genetic variations.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
- Requires S-adenosylmethionine (SAMe) as a methyl donor. - Genetic polymorphisms can affect enzyme activity. - Involved in the histamine degradation pathway.
Reported Mechanism (Provisional)
HNMT catalyzes the methylation of histamine using S-adenosyl methionine (SAM) as the methyl donor, converting histamine to N-methylhistamine for elimination. This enzyme primarily functions in the cytoplasm of cells throughout the brain, liver, kidney, and bronchial epithelium. The methylation process effectively inactivates histamine, preventing excessive activation of H1, H2, H3, and H4 histamine receptors.
Clinical Narrative (Provisional)
Research on HNMT focuses primarily on genetic polymorphisms affecting enzyme activity rather than supplementation studies. Population studies have identified several HNMT genetic variants associated with reduced enzyme activity and increased allergy susceptibility. A study of 1,518 individuals found that certain HNMT polymorphisms correlated with 30-50% reduced enzyme activity and higher rates of asthma and allergic rhinitis. Clinical evidence for HNMT supplementation remains limited, with most research concentrating on supporting the enzyme through cofactor optimization.
Also Known As
Research updates — and 25% off your first order
Join our list for source-aware wellness education, review-state updates, and product news — and unlock 25% off your first Hermetica order. Educational content is not medical advice. No spam, unsubscribe anytime.