people do use anti aromatase drugs to boost testosterone levels "naturally"... but they do so at the cost of estrogen levels, and the end result is never any singificant changes. youll be dryer and harder while on it, but when you come off and estro comes up, youll see the only diference it made was water weight. Gaspari's "novadext xt" is a very strong aromatase inhibitor, works very similar, in act almost indentical to, arimidex... and its used for natty test boosting. but studies sho no effect on body composition, even thoguh there IS a big increase in test and big decrease in estrogen. this is mostly likely explained by estrogen, it has several anabolic effects.