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TESTOLONE (RAD-140) 15mg (2-chloro-4-[[(1R,2S)-1-[5-(4-cyanophenyl)-1,3,4-oxadiazol-2-yl]-2-hydroxypropyl]amino]-3-methylbenzonitrile) is a premier, high-affinity selective androgen receptor modulator (SARM) engineered specifically for rapid lean muscle hypertrophy, neural drive, and explosive power output. Operating with exceptional tissue selectivity Ki of ~1 nM, Testolone binds directly to skeletal muscle androgen receptors to drive protein synthesis and nitrogen retention without converting to estrogen or causing non-selective androgenic side effects. Third-party HPLC lab-tested to guarantee active compound purity exceeding 98%.