Role of Silymarin in Neuroprotection and Symptom Management in Parkinson's Disease

Inclusion Criteria: * Age between 45 and 65 years old * Both sexes * Patients with Parkinson's disease on dopamine replacement therapy * Modified Hoehn and Yahr stage, MHY 1-4 (29) Exclusion Criteria: * Subjects \< 18 years of age * Pregnant or breastfeeding women * Suspected hypersensitivity to silymarin or multivitamins * Advanced liver disease (e.g., ascites, bleeding esophageal varices, and hepatic encephalopathy) * Subjects with morbid obesity, i.e., a Body Mass Index (BMI) \> 40 * Subjects with severe illness, e.g., multisystem failure, cancer, or poorly controlled diabetes, i.e., known diabetic with Hemoglobin A1C (HbA1C)\>7% * Current use of Silymarin or recent use within the past two weeks. * Other conditions, which, in the opinion of the investigators, make the patient unsuitable for enrollment.