This is from another forum, in a thread where they have a doctor in to answer some questions
"Nonsteroidal androgen or selective androgen receptor modulators (SARM) administration is currently in the research and investigational stages for the same purposes as anabolic steroids. These studies indicate that their clinical use will result in induced hypogonadism after cessation by their effects on gonadotropin levels [Miner JN, Chang W, Chapman MS, et al. An Orally Active Selective Androgen Receptor Modulator Is Efficacious on Bone, Muscle, and Sex Function with Reduced Impact on Prostate. Endocrinology 2007;148(1):363-73.].
This same opinion was voiced by investigators that, ‘‘Selectivity with regard to gonadotropin suppression represents a significant barrier to the clinical use of SARMs” [Gao W, Dalton JT. Ockham’s razor and selective androgen receptor modulators (SARMs): are we overlooking the role of 5{alpha}-reductase? Mol Interv 2007;7(1):10–3.]."
have a nice day.
"Nonsteroidal androgen or selective androgen receptor modulators (SARM) administration is currently in the research and investigational stages for the same purposes as anabolic steroids. These studies indicate that their clinical use will result in induced hypogonadism after cessation by their effects on gonadotropin levels [Miner JN, Chang W, Chapman MS, et al. An Orally Active Selective Androgen Receptor Modulator Is Efficacious on Bone, Muscle, and Sex Function with Reduced Impact on Prostate. Endocrinology 2007;148(1):363-73.].
This same opinion was voiced by investigators that, ‘‘Selectivity with regard to gonadotropin suppression represents a significant barrier to the clinical use of SARMs” [Gao W, Dalton JT. Ockham’s razor and selective androgen receptor modulators (SARMs): are we overlooking the role of 5{alpha}-reductase? Mol Interv 2007;7(1):10–3.]."
have a nice day.

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