What to watch with COMT and allergy?

The relationship between COMT variants and allergies is not well-established. COMT (Catechol-O-Methyltransferase) degrades catecholamines and also influences estrogen metabolism. The common rs4680 (Val158Met) variant reduces enzyme activity (Met carriers). This could theoretically affect histamine release from mast cells, as estrogens can promote histamine secretion. Some studies have found weak associations between COMT polymorphisms and allergic conditions like asthma or hay fever, but results are inconsistent. Importantly, a single DNA test cannot diagnose or predict allergies; they are multifactorial involving environment, diet, microbiome, and many genes. If you know your COMT variant, it may be a piece of the puzzle but not actionable alone. Evidence grade: mechanistic/unclear. Caveat: Consumer DNA tests often overclaim such links. No specific dietary or supplement changes are proven to counteract COMT-related allergy risk.