Effect of Vitamin D3 on Brain Waves in Male Parkinson's Patients With Low Vitamin D: A qEEG Study

This study is looking at whether taking vitamin D3 supplements changes brain wave patterns (measured by a brain EEG test) in men with Parkinson's disease who have low vitamin D levels. Low vitamin D is common in Parkinson's patients, and researchers want to understand if correcting this deficiency affects brain activity. **You may be eligible if...** - You are a man between 51 and 70 years old - You have Parkinson's disease at stage 3 or lower on the Hoehn and Yahr scale (mild to moderate) - Your vitamin D blood level is below 30 ng/mL (considered low) - You have a normal body weight (BMI 18.5–24.9) - You are currently taking levodopa (a standard Parkinson's medication) **You may NOT be eligible if...** - You are already taking vitamin D3 supplements - You take medications known to affect brain activity or EEG results (e.g., sedatives, antidepressants, antipsychotics, or alcohol) - You have other neurological conditions (epilepsy, migraine), heart disease, respiratory disease, or serious psychiatric illness - You have high calcium levels, kidney disease, liver disease, or uncontrolled thyroid or diabetes conditions - You are an active smoker Talk to your doctor to see if this trial is right for you.