Gotta go with Masteron; that is, Drostanolone Di-Propionate. Amazing ability to retain LBM while drastically reducing caloric intake. Strength gains can continue while BF drops and muscles harden. Similar to Halotestin in that my definition just seems so much more pronounced while on Mast but without the harshness on the liver that the 17a/a oral Halo presents. Further, IMO there is virtually no need for an AI while running Mast due to its anti-estrogen type of activity. A real nice compound if used under the right circumstances at the right dose.
Shit, what's not to like?!...