Evidence check: MC4R in the context of allergy

MC4R (melanocortin-4 receptor) is a key regulator of energy balance and appetite. Its genetic variants are strongly associated with obesity, but not directly with allergies. An indirect link via inflammatory pathways or obesity-related immune modulation is conceivable, but not supported by robust human studies. The provided context contains no specific evidence for a role of MC4R in allergy. Therefore, the evidence for such a connection is low/unclear. Consumers should be aware that allergies are multifactorial, and genetic testing for MC4R does not provide information about allergy risk.