S 23 Powder is a type of research chemical known as a selective androgen receptor modulator (SARM). Many consider it a potent SARM that could promote increased muscle mass, increase bone mineral density, and enhance muscle growth without the negative side effects of anabolic steroids.

One of the alleged primary benefits of using S 23 Powder is its ability to selectively target androgen receptors in the body, which could lead to an increase in muscle mass and strength. Unlike anabolic steroids, many researchers agree that S 23 Powder does not affect natural testosterone levels, meaning there is a lower risk of adverse side effects such as hair loss, acne, and mood swings.

Although, S23 SARM could provide the health benefits mentioned above, it is still considered as a research chemical. Buy S 23 for research use only.

S 23 Powder Product Details

S-23 is a selective androgen receptor modulator (SARM) that specifically targets androgen receptors in certain tissues while minimizing the negative effects associated with anabolic steroids. In animal studies, S-23 has demonstrated potential as a male contraceptive, achieving either a very low sperm count or no sperm at all in combination treatment, resulting in a 100% infertility rate.

Key Features of S 23 

  • 98% Purity
  • 500mg | 1000mg

Potential Benefits of S 23 Powder

S-23 is a selective androgen receptor modulator (SARM) that has been studied in animal and cell-based studies to explore its potential effects. No human studies on the use of S-23 have been published yet. However, the studies conducted so far provide valuable insights into its potential use for a range of health conditions and applications.

S-23 and Female Sexual Motivation

S-23 has the ability to increase female sex drive in ovariectomized female rats. All females that received S-23 demonstrated a significant increase in sexual motivation, suggesting it may have potential applications in female sexual health. [R]

S-23 and Muscle Growth

S-23 also demonstrated potential for enhancing muscle growth and preventing muscle atrophy in animal studies. In a study on glucocorticoid-induced muscle atrophy, S-23 inhibited the suppression of IGF-1 signaling, confirming its anabolic effects on protein synthesis. S-23 also increased lean muscle mass in mouse models, suggesting it may have applications in muscle-building and athletic performance enhancement. [R] [R]

S-23 and Male Contraception

A rat study found that combined treatment with S-23 and estradiol benzoate (EB) was an effective and reversible regimen for male hormonal contraception. This study confirms the beneficial effects of S-23 on the muscle, tissue selectivity, and favorable pharmacokinetic properties, making it a strong candidate for use in oral male contraception. [R]

S-23 and Fat Loss

S-23 may also have potential benefits for fat loss. In the same male hormonal contraceptive rat trial, animals given EB and S-23 were slimmer than controls, having a lower average weight and a lower proportion of fat mass. In rats, the dosage rate of S-23 had an inverse relationship with the proportion of fat mass. [R]

S-23 and Bone Density

S-23 has been shown to have potential benefits for bone health. In the rat model of male hormonal contraception, S-23 increased bone mineral density, which is a crucial indicator of bone health. A low bone mineral density increases the risk of osteoporosis, fractures, and other bone-related diseases. [R] [R]

How It Works

S-23 is a type of SARM that selectively binds to androgen receptors in the body, specifically in the muscles and bones. This selective binding allows S-23 to produce anabolic effects similar to those of traditional anabolic steroids, but with fewer androgenic (masculinizing) side effects. By binding to these receptors, S-23 increases protein synthesis and nitrogen retention in the muscles, resulting in increased lean muscle mass.

Unlike traditional anabolic steroids, S-23 does not significantly affect the prostate and other androgen-sensitive tissues, reducing the risk of side effects such as prostate enlargement or male pattern baldness. Moreover, S-23 has been found to partially maintain prostate and seminal muscles in animal studies.

S-23 has a half-life of 11.9 hours and reaches peak concentrations within 4 hours of administration in animals. However, its absorption and pharmacokinetics in humans are not well understood due to the lack of clinical studies.

In addition to its anabolic effects, S-23 has also been found to suppress luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in animal studies, making it a potential candidate for male hormonal contraception. S-23 has also been shown to increase bone mineral density and decrease fat mass, making it a promising therapeutic agent for conditions such as osteoporosis and obesity.


As S-23 is a research chemical and not approved for human use, there are no specific guidelines on who should or should not use it. However, as with any experimental compound, caution should be exercised when considering its use. It is important to note that there are potential risks and side effects associated with S-23, and it is not recommended for human consumption.

It is also advisable to consult with a healthcare professional before using any experimental compound.

Potential Side Effects

As a SARM is still under laboratory research and not approved for human consumption, the safety of S-23 remains uncertain. Animal studies have shown potential benefits in muscle growth, bone density, and an oral male contraceptive. However, common side effects reported in animal studies include increased aggression and night sweats. Like other compounds, the misuse or abuse of S-23 may lead to negative health consequences, highlighting the importance of further research and caution in its use.


In conclusion, S-23 SARM has shown promising results in laboratory research use. It has been identified as a strong candidate for male hormonal contraception, as an oral male contraceptive with a half-life of 11.9 hours. Its ability to increase bone density and lean muscle gains, while reducing body fat and muscle loss, has been demonstrated in male rats. Additionally, S-23 has been associated with increased sexual desire and may have a role in male birth control pill development. Researchers have identified S-23 as a full agonist with a molecular formula of C18H13ClF4N2O3, acting in the same way as other compounds in its class.

While there have been reports of side effects such as increased aggression and night sweats, these have been limited to research use and intended cycle lengths. Further studies are needed to explore its potential impact on fertility and to determine if its effects can be completely reversed.

Overall, the research on S-23 suggests that it may lead to innovative approaches for hormonal male contraception and improve body composition in men.


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