after now almost a year and a half im upped by my doc to,, to 1.5 cc of Watson every 12 days , and wow guys just that half cc made a difference,,in how I feel and my training,,.seriously,,,didn't think I notice it but dang I sure did,,about the 3rd day,,,my opinion is a lot of doc wont bring you up to optimum levels just basic levels,,i went from like 600 to about 850....