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Also reported in: ng/mL
A normal whole blood histamine level is within the expected range for healthy individuals. Normal histamine supports proper immune mast cell function, gastric acid secretion, and brain histaminergic neurotransmission (wake-sleep regulation, appetite control). This result does not indicate significant histamine metabolism dysfunction.
Very low whole blood histamine is associated with an overmethylation state — where excess methyl groups are being produced and deplete neurotransmitter activity. In orthomolecular psychiatry frameworks, very low histamine is linked to schizophrenia subtypes, paranoid thinking, and certain anxiety and psychotic spectrum presentations. Histamine acts as a neurotransmitter in the brain and regulates wake-sleep cycles and cognitive function.
Discuss with a practitioner familiar with methylation biochemistry and histamine psychiatry. Reducing methyl donors and addressing overmethylation is typically the therapeutic direction.
Whole Blood Histamine: {{value}} {{unit}} — very low (ref: {{low}}–{{high}}; critical: <10)Low whole blood histamine may indicate overmethylation — a biochemical state where excessive methylation depletes histamine, which acts as a brake on neurotransmitter activity. In alternative psychiatry, low histamine overmethylators are described as anxious, inner-directed, and prone to seasonal depression. This framework is not universally accepted by mainstream medicine but has practitioners in integrative psychiatry.
Discuss methylation status and methylation profile with an integrative practitioner. Avoid excessive SAMe or folate supplementation if overmethylation is confirmed.
Whole Blood Histamine: {{value}} {{unit}} — low (ref: {{low}}–{{high}})Borderline low histamine may reflect mildly increased methylation activity in the body, or dietary restriction of histidine (the amino acid precursor to histamine). In the context of other methylation markers (homocysteine, folate, B12, SAMe:SAH ratio), borderline-low histamine can inform a picture of methylation status.
Review methylation markers comprehensively. Discuss with an integrative health practitioner for clinical interpretation.
Whole Blood Histamine: {{value}} {{unit}} — borderline low (ref: {{low}}–{{high}}; borderline: 22–30)A normal whole blood histamine level is within the expected range for healthy individuals. Normal histamine supports proper immune mast cell function, gastric acid secretion, and brain histaminergic neurotransmission (wake-sleep regulation, appetite control). This result does not indicate significant histamine metabolism dysfunction.
Normal result.
Whole Blood Histamine: {{value}} {{unit}} — normal (ref: {{low}}–{{high}})Optimal whole blood histamine in the 30–70 nmol/L range reflects appropriate histamine production, storage in basophils and mast cells, and metabolism. This range is associated with normal methylation balance, appropriate immune mast cell function, and normal brain histaminergic tone for wake-sleep regulation.
Good result. Normal histamine balance.
Whole Blood Histamine: {{value}} {{unit}} — optimal (ref: 30–70)Borderline elevated histamine can reflect undermethylation — a state where insufficient methylation allows histamine to accumulate. In orthomolecular psychiatry, high histamine is associated with depression, perfectionism, obsessive thinking, seasonal allergies, and in some frameworks, the histadelic depression subtype. Dietary high-histamine foods (fermented foods, wine, aged cheese) can also transiently raise blood histamine.
Review dietary histamine sources. Discuss methylation status with an integrative practitioner. MTHFR testing may be relevant.
Whole Blood Histamine: {{value}} {{unit}} — borderline elevated (ref: {{low}}–{{high}}; borderline: 93–120)Elevated whole blood histamine above the reference range can indicate undermethylation (reduced methylation reducing histamine degradation), mast cell activation syndrome (MCAS — where mast cells inappropriately release histamine), histamine intolerance from reduced DAO enzyme activity, or high dietary histamine intake. In undermethylation, histamine accumulates because HNMT enzyme (which degrades histamine) requires methylation.
Discuss with your doctor. Investigate for MCAS, DAO deficiency, and methylation status. Trial of low-histamine diet and possible methyl donors (SAMe, methionine) may be explored with practitioner guidance.
Whole Blood Histamine: {{value}} {{unit}} — elevated — possible undermethylation (ref: {{low}}–{{high}}; elevated: >93)Very high whole blood histamine above 150 nmol/L is a significant finding suggesting either noticeable mast cell activation syndrome (MCAS) with systemic histamine release, noticeable DAO enzyme deficiency causing histamine accumulation from diet, or a rare histamine-secreting mast cell tumor (mastocytoma). Acute anaphylaxis also may contribute to transiently very large histamine release.
Seek medical evaluation. Testing for tryptase (mast cell marker), DAO enzyme activity, and investigation for mastocytosis are appropriate. Antihistamine therapy and low-histamine diet are typical initial interventions.
Whole Blood Histamine: {{value}} {{unit}} — very high (ref: {{low}}–{{high}}; critical: >150)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.