19 yesterday. So far all days have been 18 - 21 (180 - 210 mg).
It was pointed out to me (Wheelchairkamikaze) that this is an estimate. The FDA doesn't regulate supplements and there is no guarantee that I'm getting exactly 10 mg in each dose.
I'm willing to take that chance. This trial isn't an exact replica of the Med-day trial, but it's what is available to me now.