SR9009
Synthetic REV-ERBα/β agonist affecting circadian metabolism, endurance, and lipid oxidation; not a true SARM despite grey-market classification.
SR9009 was developed by Burris et al. and showed increased exercise endurance and fat loss in mouse models, generating significant grey-market interest. Animal studies demonstrate cardioprotective effects under pressure overload, anti-tumor activity in small-cell lung cancer and prostate cancer, and anti-inflammatory effects in sepsis-induced lung injury. Critically, a 2019 PNAS study showed SR9009 exerts REV-ERB-independent effects on cell proliferation and metabolism, meaning some observed benefits may not reflect REV-ERB agonism. No human clinical trials have been published; all efficacy and safety data derive from in vitro and animal models. The compound is on the WADA Prohibited List and has no approved medical use.