Just like'd to point out that I haven't given up on finding at least one of the hundreds of studies proving AIs causing joint sides in men at TRT dosages (which tend to be higher than what you need if you take AI only for test boosting purposes) if serum T and E2 levels are paid attention to, and I still couldn't find a single one.
**broken link removed**
'A weekly anastrozole dose of 2–7 mg was used in the study by Leder et al., and no harmful effects on bone turnover or bone mineral density were observed [26]. Mauras et al. conducted a 10-week study (4 late-pubertal boys and 4 young adults) with anastrozole at a weekly dose of 7 mg, and no adverse effects on bone density, body composition, or muscle strength were reported [27]. On the contrary, anastrozole at a weekly dose of 14 mg triggered a decrease in bone formation markers and increase in bone resorption markers, so this high dose should be avoided due to possible harmful effects on bone turnover [28]. When it comes to letrozole, Trunet et al., in their open dose-finding study, conducted on healthy non-obese male volunteers (age 20–48 years), explored the effects of single doses of letrozole ranging from 0.02 to 30 mg. A reduction in estrogen levels and increase in LH and testosterone levels were achieved with a single minimal (0.02 mg) dose of letrozole; however, the effect lasted for 48 h. Moreover, the effect of a single dose of 0.5 mg lasted for 72 h [29]. Furthermore, Loves et al. reported, in their open uncontrolled 6-month pilot study conducted on 12 severely obese men (BMI >35 kg/m2), that letrozole at a dose of 2.5 mg once a week was an acceptable starting dose for men with obesity-related hypogonadotropic hypogonadism [30]. According to available data, we believe that the potential recommended starting dose of letrozole, in most cases of male obesity-related hypogonadotropic hypogonadism, should be 0.5 mg administrated once every 3 days or 2.5 mg once a week according to the study by Loves et al.'
So at 2mg/day of anastrozole there is some bone sides...
For controlling aromatase overactivity on TRT purposes the highest does poeple are taking is half of that.
For test boosting purposes people are taking 0.5mg E3D to EOD.
So to sum it up, nothing to fear regarding your bones if you keep your E2 above 15pg/ml and check frequently.
Btw. the first AI that is intended for use for male hypogonadism leflutrozole is based on letrozole (which is the strongest of the AIs) is currently in phase II trials.