HTR2C (5-Hydroxytryptamine Receptor 2C) is a serotonin receptor subtype involved in regulating mood, appetite, and behaviour. It plays a key role in central nervous system (CNS) functions and is a target for certain psychiatric medications. Variations or dysfunctions in HTR2C have been linked to mental health conditions such as depression, anxiety, and schizophrenia, as well as metabolic disorders.