A recent study in the journal Movement Disorders examined the association between plant-based diets and Parkinson's disease (PD) risk, using data from 126,283 UK Biobank participants. The research found that those in the highest quartile for healthful plant-based diet indices (hPDI) had a 22% lower risk of PD, while unhealthful plant-based diets (uPDI) correlated with a 38% higher risk.