Myths vs facts: MC4R and allergy

MC4R (Melanocortin-4 Receptor) is primarily known for its role in appetite regulation and energy balance. Mutations in MC4R are a common cause of monogenic obesity. There is no strong, clinically relevant evidence linking MC4R variants to allergies. While some basic research suggests melanocortins may have immunomodulatory effects, this is not established for allergy development or management. Claims that MC4R genetic tests can predict allergy risk are likely marketing-driven or speculative. Evidence grade: unclear/marketing. Allergies are influenced by complex environmental and immune factors, not by single SNPs in MC4R. Consumers should be cautious of overinterpretation.