Others that I have spoken with say to keep T3 at a maximum dosage of 12.5-25 mcg while bulking or you won't put on much size, no matter how much gear you're on. But in BTPB, Author L. Rea suggests using doses of 25-50 mcg, and that it is suppossed it aid in the partitioning effect. I guess it would also be size dependent, as most of the cycles that he proposes are geared towards guys that are almost 300 lbs. I myself am only 200 lbs. at the moment so I probably wouldn't go over 25 during a bulker, no matter what.