"healthy eugonadal subjects (14-26 yr of age) were recruited. In a cross-over study, 12 were randomly assigned to 25 and 50 mg exemestane daily, orally, for 10 d [...] Exemestane suppressed plasma estradiol comparably with either dose [25 mg, 38% (P <or= 0.002); 50 mg, 32% (P <or= 0.008)], with a reciprocal increase in testosterone concentrations (60% and 56%; P <or= 0.003 for both). Plasma lipids and IGF-I concentrations were unaffected by treatment. [...] Maximal estradiol suppression of 62 +/- 14% was observed at 12 h. The drug was well tolerated."Regarding Aromasin 25mg a day is extreme overkill. 25mg a day or 12.5mg ED or EOD is for steroid junkies. For the average person 2.5mg M/W/F is a starting dosage used clinically and go from there.
Pharmacokinetics and dose finding of a potent aromatase inhibitor, aromasin (exemestane), in young males.
J Clin Endocrinol Metab. 2003 Dec;88(12):5951-6.
Studies on the 2.5 mg doses were done in postmenopausal women, who lack functioning ovaries, where all estrogens are being produced adrenally. AIs are ineffective at estrogen suppression in pre-menopasal women, and only SERMs are used.