My husband was diagnosed a year ago with PD. We researched side effects of pharm drugs and decided not to go that route. We were blessed to find the Hinz protocol and found a clinic in WI to administer and monitor the amino acid therapy. He is on a very low dose and is doing amazing! It took a few months to find the right dosage, but now has his humor back, facial expressions, smoother movements, and more energy mentally and physically. So I definitely would say that this therapy is working for him.