Pharmaco(Epi)Genetic, Proteomic, and Microbiomic Study of Obsessive-Compulsive Disorder

This study is analyzing genetic, protein, and gut bacteria patterns in people with obsessive-compulsive disorder (OCD) to better understand what biological factors drive the condition and identify potential new treatment targets. **You may be eligible if...** - You are between 19 and 70 years old - You have been diagnosed with OCD according to standard psychiatric guidelines - You are either not currently taking any psychiatric medication, or you have been off all psychiatric medications for at least 3 months **You may NOT be eligible if...** - You have a neurological disorder (such as epilepsy or a movement disorder) - You have a psychotic disorder (such as schizophrenia) - You have used alcohol or drugs heavily in the past 6 months - You have any evidence of another brain disease Talk to your doctor to see if this trial is right for you.