Myths vs facts: BDNF and allergy

The question about myths vs. facts regarding BDNF (Brain-Derived Neurotrophic Factor) and allergy is not directly addressed in the provided context. Based on general knowledge, BDNF is not limited to the brain; it is also produced by immune cells and may play a role in allergic inflammation. A common myth is that BDNF alone causes allergies – in reality, it is one component in a complex cytokine and immune cell network. Another myth is that BDNF supplements can cure allergies; no robust clinical trials support this, and research is still preclinical. A fact is that elevated BDNF levels have been observed in asthma and allergic rhinitis, but its clinical utility as a biomarker or therapeutic target remains unclear. The evidence is therefore rated as mixed: there are mechanistic and animal studies, but no strong human data demonstrating causal or therapeutic benefit. Caution is warranted against exaggerated marketing claims for BDNF tests or supplements in the allergy context.