12/day is the maximum dose. I've seen 3 different GIs, including a GI at Mayo Clinic, and they all told me this. I've been on 12/day for about
a year now. One of my GIs said it probably wouldn't hurt you if you took more than that, but it also wouldn't help anymore than 12/day.
Jano - I think most doctors say 12/day is the max. because higher doses have not been tested in studies.