You may be eligible to participate in this study if:

• You are willing and able to give informed consent and comply with study requirements.
• You have been diagnosed with PD within the last 5 years.
• You are receiving medications to treat your PD for 2 years or less (the study staff will review your medications to determine if you are eligible).

You may not be eligible to participate if:

• You have used creatine within the 2 weeks before entering the study.
• You have participated in another drug trial within the month before the start date of the NET-PD study.
• You have a known sensitivity to creatine.
• The study team does not feel that it would be safe for you to participate due to your overall medical condition.
• The study team is not confident that you have a diagnosis of PD.