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S-23, 600mg (10mg/capsule)

Original price was: $85.95.Current price is: $69.95.

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  • Chemical Formula: C21H27N2O5P
  • Molecular Mass: 418.42
  • Synonyms: (2S)-2-[[(2S)-2-[[[(1R)-1-aminoethyl]-hydroxy-phosphoryl]methyl]-3-phenyl-propanoyl]amino]-3-phenyl-propanoic acid
  • Molar Mass: 418.42
  • CAS Number: 1010396-29-8
  • PubChem: 24892822
  • Total Amount of the Active Ingredient: 10mg/1 capsule



  • S-23 is a selective androgen receptor modulator (SARM) currently being studied and dissected for potentially treating patients with muscle wasting and osteoporosis. A pre-clinical study done on rats has shown S-23 to increase muscle mass and bone density with no adverse effects.


Product Quality

All of our products are lab tested and the results are occasionally published on the website.

You can have the product you bought from us tested at any HPLC-licensed testing facility and if the results are negative, we will refund the following:

  • Cost of HPLC test
  • Total amount of the order + shipping fee

All of our products are lab tested and the results are periodically published on the website.


Peer-Reviewed Studies 

Solomon, Z. J., Mirabal, J. R., Mazur, D. J., Kohn, T. P., Lipshultz, L. I., & Pastuszak, A. W. (2019)

Sexual medicine reviews, 7(1), 84-94.

So, Y. M., Wong, J. K., Choi, T. L., Prabhu, A., Stewart, B., Farrington, A. F., … & Ho, E. N. (2021)

Drug Testing and Analysis, 13(2), 318-337.