This study found that eating more foods rich in live microbes—like fermented products (yogurt, kimchi) and fresh fruits and vegetables—is associated with lower rates of Parkinson’s disease in American adults. The protective effect was strongest in people without obesity. The live microbes appear to work by maintaining a healthy gut environment, reducing inflammation, and protecting nerve cells from damage. This suggests that regular consumption of microbe-rich foods from nature might be a simple, inexpensive way to help prevent or slow Parkinson’s disease.