This study tests if insulin (a hormone that helps control blood sugar) and glutathione (a natural antioxidant that protects cells) can help people with Parkinson's Disease (PD), a disorder that affects movement. They will compare these to a placebo, a fake treatment that looks real but isn't. The study will check how safe and effective the treatments are.

Key Points:

• This study is only for people with Parkinson's Disease who do not have diabetes.
• Participants must be able to keep their diet and medications stable during the study.
• If you have certain health issues like uncontrolled asthma or a history of strokes, you cannot join.

Participants must not have diabetes or certain other health conditions. They should have a stable diet and medication routine. The study excludes people with certain health problems like severe asthma, recent strokes, or uncontrolled heart disease. Participants will need to have a caregiver if they can't take the study medicine themselves. The study aims to see if this new treatment can be safe and helpful for people with PD.