OR51L1 is an olfactory receptor gene located on chromosome 11 that encodes a G-protein coupled receptor with odorant binding activity localized to the plasma membrane. While OR51L1's primary characterized function is olfactory signal transduction, emerging evidence suggests broader biological relevance beyond chemosensation. In high-grade serous ovarian carcinoma (HGSOC), OR51L1 methylation has been identified as an epigenetic event associated with disease development 1. A genome-wide association study in alcohol dependence identified an OR51L1 SNP with significant association (p=7.3×10⁻⁸) to the DSM-IV criterion of persistent desire or inability to cut down on drinking, though this finding was not replicated in an independent sample 2. In anorexia nervosa, OR51L1 expression was substantially upregulated (>two-fold) following weight restoration, suggesting potential involvement in metabolic or nutritional status regulation 3. These observations indicate OR51L1 may have functions beyond olfaction, though mechanistic understanding remains limited. The clinical significance of OR51L1 dysregulation in cancer and psychiatric/metabolic conditions warrants further investigation to determine whether it represents a functional driver or an epiphenomenon of disease pathogenesis.