i have a buddy at work who is 36 or 37,about 5'9 and 170 +or- 5 pounds with prolly about 15-18% bf. says he weight trains 5 times per week,and does mma training for cardio,he is wanting to loose body fat and gain lean mass. i am not sure how intense/proficient his training is,but his diet seems to be lacking. he takes lots of exspensive supplement stacks but doesnt seem to focus enough on real food. however he was wondering if he took an AI if it would help to raise test.lower estrogen and overall decrease bodyfat. if yes would he be better off buying somthing from lion or would an over the counter like 6oxo be more what he is looking for? appreciate the help.peace.