The Nac arrived in the mail to the tune of 600 mg capsules. I am starting slowly. Have started one capsule a day for a week. I have already had two and I am encouraged since it has not made my stomach "go off" yet! When I get to the end of the week I will increase the dosage to two caps a day. Etc. I keep thinking of the "before and after" MRI's pre and post Nac! Glutathione – Getting the k’NAC’k of Parkinson’s disease | The Science of Parkinson's disease