Since I haven't been put on L-dopa, I'm going to give this supplement another try. L-tyrosine is converted to l-dopa, which becomes dopamine. On my first trial of it, I went overboard, got headaches, which are, I've come to find out, a minor side effect. I'm going to start slower, taking 500 mg once per day in the morning. I'll titrate the dosage up slowly until I'm taking 500 mg tid. I'll keep you posted as to how this is working. My neuro seems to want to delay Sinemet. That's fine, but I need something to raise the dopamine levels. Wish me luck.