Myths vs facts: HDL and allergy

The claim that HDL cholesterol directly influences allergies is not well supported by evidence. HDL has anti-inflammatory properties, and some observational studies suggest an inverse association between HDL levels and allergic conditions like asthma or hay fever. However, the evidence is weak and mostly mechanistic or associative. Causal links are unproven, as allergies are multifactorial (genetics, environment, microbiome, immune status). Moreover, high HDL due to certain genetic variants may paradoxically increase infection risk. It is a myth that high HDL automatically protects against allergies. Equally false is the idea that low HDL causes allergies. The clinical relevance of HDL for allergies is minimal; focus should be on proven measures like allergen avoidance and symptomatic treatment. Beware of marketing that promotes HDL tests as allergy predictors.