Myths vs facts: IgE and stress

The claim that stress directly raises IgE and thereby causes allergies is a myth. In reality, chronic stress can influence immune regulation via the hypothalamic-pituitary-adrenal axis and sympathetic nervous system. Studies indicate that stress may promote histamine release and other inflammatory mediators, and can indirectly modulate IgE production – especially in individuals with an atopic predisposition. However, stress alone does not trigger IgE sensitization; prior allergen exposure and genetic susceptibility are required. The evidence is based on human observational studies and animal data, not on randomized controlled trials. Another myth is that IgE is only relevant for allergies. In fact, IgE is crucial for defense against parasites (e.g., helminth infections). For MyBody-X test users: an elevated IgE level in blood should always be evaluated by a physician – stress alone does not explain clinically significant IgE levels. The predictive value of genetic tests for IgE-related SNPs is limited, as environmental and lifestyle factors dominate.