This study examined over 390,000 posts on X (formerly Twitter) about brain and health to understand how people express positive and negative feelings. Researchers found that negative posts were shared more often and were linked to serious health concerns like COVID-19 and brain inflammation. People expressing negative sentiment mentioned medications like lorazepam and comfort foods like pizza, while those with positive sentiment discussed resilience, mindfulness, and different medications. The research highlights both the benefits and dangers of sharing health information on social media.