Overview

• The study, published in *Neurology*, analyzed data from nearly 43,000 participants, none of whom had Parkinson’s at the start, over a period of up to 26 years.
• Consuming 11 or more daily servings of ultra-processed foods correlated with a 2.5-fold higher likelihood of showing three or more early Parkinson’s markers compared to those eating fewer than three servings.
• Early symptoms examined included sleep behavior disorders, reduced sense of smell, depression, impaired color vision, and daytime sleepiness, with constipation being the only symptom not linked to diet.
• Ultra-processed foods, such as sugary beverages, packaged snacks, and processed meats, are thought to contribute to inflammation and oxidative stress, which may accelerate neurodegenerative processes.
• The study did not establish a direct link to Parkinson’s diagnoses, and researchers emphasized the need for further causal and interventional studies to explore prevention strategies.