Sarcosine dosage?

What is the optimal sarcosine dosage?
1, 2, 3 gram(s) per day?
Treatment duration : month, years?
Side effects?

Studies show that 1 to 4 grams is effective in many people. From what people have said in this forum - the dose can vary a lot by person. You can read more here:

http://www.schizophrenia.com/glycinetreat.htm

and here:

http://schizophrenia.com/?p=740

Research studies here:

Full Paper here: