Rick,

I was taking 1 tsp of MP powder with 1 Sinemet CR 100/25 four times a day. After two months I noticed the MP makes me feel like I need more and that scares me. I have not had any problems with L-Tyrosine and I have been on it for approx. 4 or 5 months. I wouldn't do more than 500 mg daily to start with. I can take 1500 mg but mainly take 1000 mg between 6pm to 6am with Melatonin. I stopped taking Creatine and L-Glutamine on a regular basis until I get into a regimented exercise program.