That 98% he is quoting is from an actual study on men btw . Ive watched a documentry on the history of a.i's and the three most important men in that field would all disagree with you. A.i's work very well in males.
wrong. show me ONE study that shows 98% estorgen suppression in healthy males with letrozole. they can use 10mg letrozole if you want.
98% estrogen suppression is IMPOSSIBLE TO ACHIEVE IN HEALTHY MALES.
"Although aromatase inhibition by anastrozole and letrozole is reported to be close to 100%, administration of these inhibitors to men will not suppress plasma estradiol levels completely. In men third-generation aromatase inhibitors will decrease the mean plasma estradiol/testosterone ratio by 77%"
from
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3143915/"When testicular testosterone and estradiol synthesis are suppressed and testosterone is administered exogenously in combination with letrozole, however, the estradiol/testosterone ratio is suppressed by 81% [30], which is only marginally different from the suppression of this ratio in intact men after treatment with letrozole."
http://www.ncbi.nlm.nih.gov/pubmed/18829517 90-97% suppression in females
http://www.ncbi.nlm.nih.gov/pubmed/11821457 80-93% suppression with 1mg adex, 84-98% with letro IN FEMALES
http://clincancerres.aacrjournals.org/content/4/9/2089.abstract 93-94% suppression with 25mg aromasin IN FEMALES
http://www.researchgate.net/publication/13470629_In_vivo_measurement_of_aromatase_inhibition_by_letrozole_%28CGS_20267%29_in_postmenopausal_patients_with_breast_cancer98% IN FEMALES
btw, no difference in 0.5mg letro and 2.5mg letro there.
you can blast 100mg of letro and STILL wont get your estrogen into single digits on a gram of test. NOT A CHANCE.
and you can see that all AIs have nearly the same strength in women. all above 90%. in men they are ALL equally WEAK. around 50-60% suppression maybe. same for 1mg adex, 2.5mg letro and 25mg aromasin a day.
http://www.eje-online.org/content/158/5/741.fullabout 50% estrogen reduction with 2.5mg letro a week in MALES. YES ONLY 50%
note that just 3.5mg letro a week (thats only 1mg more) in FEMALES suppresses estrogen by OVER 98% (see last link i posted)
"most of the recent studies with aromatase inhibitors in boys and adult men do not show major detrimental effects on bone"
this is pretty much PROOF that estrogen cant be reduced by 98% in men, because women have HUGE bone density issues after letrozole treatment because low estrogen = low bone density. NO SUCH PROBLEM IN MALES.
the loss of libido with letro has other reasons. theres a high probability that letro has a profound effect in BRAIN aromatase. thats why most people lose libido on it.
it strongly reduces aromatase in BRAIN TISSUE. it does NOT achieve strong suppression ANYWHERE else in MEN.
my point stands. i wont dig out another 300 studies. AIs ARE WEAK IN MEN. ITS A FACT. case closed.