Is BDNF useful for allergy?

BDNF (Brain-Derived Neurotrophic Factor) is primarily known for its role in neuronal health and plasticity. Some preclinical research suggests BDNF may modulate immune responses and could be involved in allergic conditions like asthma or atopic dermatitis. However, human evidence is very limited. No large, well-controlled trials have demonstrated that measuring or supplementing BDNF improves allergy symptoms. Current mechanistic studies are insufficient to support clinical use. Therefore, BDNF is not considered a useful marker or treatment for allergies based on existing evidence. Individuals seeking allergy management should rely on proven approaches such as antihistamines, allergen avoidance, and immunotherapy. Genetic or blood tests for BDNF currently offer no actionable guidance for allergy sufferers.