OR13G1 encodes an olfactory receptor that functions as a G protein-coupled receptor involved in odorant detection and sensory perception of smell. The receptor binds odorant molecules and mediates chemical stimulus detection through activation of olfactory signal transduction pathways. OR13G1 has been investigated in genetic association studies for cardiovascular and renal disease. A genome-wide association study identified the OR13G1 rs1151640 polymorphism as associated with myocardial infarction risk (odds ratio 1.40 for carriers of two risk alleles) 1. This finding was subsequently replicated in a familial hypercholesterolemia cohort, where the same polymorphism showed association with coronary heart disease (hazard ratio 1.14, P=0.03) 2. However, three independent replication studies failed to validate these associations in different populations 34, suggesting the initial findings may represent false-positives from multiple testing or population-specific effects. OR13G1 was also identified in a candidate gene study as associated with chr1 kidney disease prevalence in Japanese individuals with metabolic syndrome 5, though the mechanism linking an olfactory receptor to kidney disease remains unclear. Clinically, the inconsistent replication of OR13G1 associations highlights the challenges in translating genome-wide association findings to clinical practice and emphasizes the need for rigorous validation before implementation in disease risk prediction.