GTIN: 685457001406 SKU: 10-1 Category:


S23 SARM is a nonsteroidal selective androgen receptor modulator widely regarded in anecdotal reports and by its binding affinity to the androgen receptor as the most potent SARM available, nearly as potent as anabolic steroids [1]. It is being studied for its effects on lean muscle gains, bone density, fat loss, sex drive, and as an oral male contraceptive. The oral bioavailability of S23 is ~96%, peak levels are achieved at about 4 hours and the half life of S23 is 11.9 hours [1]. S23 mimics the action of testosterone in muscles and bones and may stimulate protein synthesis and muscle growth. S23 has never been clinically tested in humans so the safety profile of S23 in humans has not been established. SARMs studies indicate that it may induce liver damage, fertility, and for males, natural testosterone levels.

It is presently being researched as a potential male contraceptive agent in rats. During a study in rats it caused temporary interruption in fertility in all specimens it was tested on [1]. While this effect was reversed in rats, it is important to note that this product has never been tested in humans and it is unknown if it interrupts fertility temporarily, permanently, or not at all. While S23 SARM has a high oral bioavailability, it is important to note that in this study these rats were injected with S23.

This study also found that S23 increased lean muscle mass and decreased bodyfat in a dose-dependent manner, and was able to outcompete the catabolic effects of estradiol benzoate administration [1]. Another rat study found that S23 prevented fast-twitch and slow-twitch muscle loss from glucocorticoids [2].

The rat model also demonstrates an increase in bone mineral density from S23 SARM administration. Low doses appeared to work equally well to high doses for the purposes of bone density [1].

A study on postmenopausal female rats demonstrated that most SARMs were able to increase sexual activity and drive, with S23 in particular causing the largest increase in sexual motivation without inducing growth in the uterus and uterine lining [3].

Data on our S23 Powder for sale


CAS Number: 1010396-29-8

Formula: C18H13CIF4N2O3

Molar Mass: 416.753 g/mol

Class: Selective Androgen Receptor Modulator,

Experimental Application: Muscle mass gain, fat loss, significant increases in strength.

Storage: Store in a cool dry place away from direct sunlight to maximize shelf life.


  • Foil Pouch with UV resistance to minimize degradation.
  • Minimum 98% pure.
  • 2,050mg S23 per pouch per pouch.
  • Measuring tools not included.


This preparation is for laboratory research purposes only and is not approved by the FDA for human consumption. S23 IS NOT A DIETARY OR SPORTS SUPPLEMENT.


Why buy S23 from Sports Technology Labs?


If you’re trying to figure out where to buy S23 online, there certainly seem to be plenty of choices out there. However, not all companies offering S23 for sale are alike—or equally trustworthy. To buy liquid S23 from a randomly selected pharmaceutical company or website is dangerous, even if the price looks reasonable, because you can’t be certain about their quality-control processes.

At Sports Technology Labs, however, you can find the highest quality S23 for sale anywhere on the internet with fast shipping. We’re an American business headquartered in Connecticut, and our products are tested in U.S.-based third-party laboratories that certify minimum 98% purity. That’s why we’re confident in our claim that we offer the best S23 for sale on the market today. And if you have any questions about our liquid S23 products, you can also contact us and we’ll respond as soon as possible. S23 is also available in Liquid form.


Abuse Warning


S23 is an investigational compound still awaiting FDA approval and is not a dietary supplement. At Sports Technology Labs we are chemical suppliers, not medical doctors, and our expertise is sourcing and quality control. Sports Technology Labs does not encourage or condone consumer use of SARMs products, they are for research purposes only. Anecdotal reports online indicate S23 dosage of 10mg and 20mg per day used by many individuals. An S23 SARM dose of 30mg per day has even been reported by several individuals in online forums. These dosages may not match those used in carefully designed medical research protocols and may pose a serious risk of adverse effects in users.

We consider the duplication of anecdotal protocols online to be a risky practice. SARMs should only be used under the supervision and direction of a medical doctor or designated research authority. We strongly discourage the use of SARMs for performance enhancement in sports and bodybuilding, and warn against “bro science” and peer consensus when making decisions about human health.




1. Jones, A., Chen, J., Hwang, D. J., Miller, D. D., & Dalton, J. T. (2009). Preclinical characterization of a (S)-N-(4-cyano-3-trifluoromethyl-phenyl)-3-(3-fluoro, 4-chlorophenoxy)-2-hydroxy-2-methyl-propanamide: a selective androgen receptor modulator for hormonal male contraception. Endocrinology150(1), 385–395.

2. Jones A, Hwang DJ, Narayanan R, Miller DD, Dalton JT. Effects of a novel selective androgen receptor modulator on dexamethasone-induced and hypogonadism-induced muscle atrophy. Endocrinology. 2010 Aug;151(8):3706-19. doi: 10.1210/en.2010-0150. Epub 2010 Jun 9. PMID: 20534726.

3. Jones, A., Hwang, D. J., Duke, C. B., 3rd, He, Y., Siddam, A., Miller, D. D., & Dalton, J. T. (2010). Nonsteroidal selective androgen receptor modulators enhance female sexual motivation. The Journal of pharmacology and experimental therapeutics334(2), 439–448.

S23 Powder | 2 Grams

Additional information

Weight 3.0 oz