I DO NOT RUN AN AI UNLESS I ABSOLUTELY NEED TO... IF YOU KNOW WHAT YOU ARE DOING... ESTROGEN CAN BE YOUR FRIEND WHEN ON CYCLE... AM I RIGHT OR AM I RIGHT OR AM I RIGHT !?!?!?!? I kinda like a lil bit of bloat with my cycle... so because of that I wont run an AI .... usually I will .25 mg EOD of ADEX when using Deca but that's bout it...