If you've tried everything and still struggle with OCD symptoms, there may be more to the story. Key Takeaways: Living with OCD can be exhausting. The constant mental noise, intrusive thoughts, repetitive behaviours and relentless self-doubt can leave people feeling trapped and overwhelmed. Growing research points to multiple biological factors influencing OCD symptoms, Below, we explore some of these factors, including nutrient deficiencies, inflammation, gut health, immune function,...