acai berry

i'm four years post op RNY i've gained about 25 lbs.  i've been dieting for the last few weeks. my goal is to get 15 off.  I started using the acaitrim. does anyone know if this is safe for me. I take one twice a day instead of the 2 twice a day. i'm just concerned about my pouch.  I know that the alli is safe. i might just have to change to that. please if anyone has info