How much Sarcosine (N-MethylGlycine) do I need to take to have the therapeutic effect for schizophrenia? Thanks in advance!

Some people have said 3 grams, 3000 mg, but I would like to hear your thoughts and ideas on how much to take PER DAY. As with L-Theanine, I take 200 mg twice a day and studies show that 250/day is effective at reducing positive and cognitive symptoms of schizophrenia. Thank you!