Effect of Mediterranean Diet on Nutrition in Parkinson's Disease Patients With Bilateral Subthalamic Deep Brain Stimulation

All individuals in the intervention group will be instructed to adhere to Mediterranean diet recommendations for a period of three months following the activation of the deep brain stimulation device. Nutritional training sessions focusing on the Mediterranean diet will be provided and reinforced during monthly follow-up interviews. In line with these recommendations, olive oil will be promoted as the primary dietary fat. Participants will be encouraged to consume a minimum of 300-400 grams of vegetables daily and 450 grams of fresh fruit or alternatively, 300 grams of fresh fruit and 30 grams of dried fruit. The consumption of bakery products, sugary snacks, and carbonated beverages will be discouraged. White meat will be favored over red meat in meal planning. Participants will also be advised to include 450 grams of fish, 30 grams of oilseeds, and 180 grams of legumes in their weekly diets. There is no routine Mediterranean diet recommendation after STN DBS.