S23 is a is a bioavailable and nonsteroidal SARM (Selective Antrogen Receptor Modulator) created by GTx, a pharmaceutical company that develops hormonal drugs as well as several other SARMs, as a potential male contraceptive. It . Studies show that, unlike testosterone or anabolic steroids, S23 SARM increases bone tissue and lean muscle while being tissue selective. This specificity is targets lean muscle mass and fat oxidization.
Chemical Structure of S23 SARM
Chemical Name: (2S)-N-(4-cyano-3-trifluoromethylphenyl)-3-(3-fluoro-4-chlorophenoxy)-2-hydroxy-2-methyl-propanamide
Molecular Formula: C18H13ClF4N2O3
Half Life: 18-24 hours
A study on rats given S23 showed muscle mass increased along with bone density while simultaneously reducing the rat’s overall body fat. The study also showed that there was a direct correlation in the rate of fat loss in the rats to the size dose. The rats given higher doses of S23 SARM showed a larger decrease in body fat.
S23 compared to other SARMs (Andarine S4, RAD 140, Ostarine MK 2866, MK 677 and YK11)
S23 has some very common properties of other SARMs such as the increase in the following:
- Muscle mass
- Fat loss
- Stamina and energy
- Tissue repair
- Higher than usual aggression levels
However, it has several properties unique to S23.
1. S23 AND TESTOSTERONE PRODUCTION SHUT DOWN
The most notable is that studies showed that, unlike other SARMs such as S4, RAD 140, MK 2866, MK 677 and YK11, S23 SARM completely shut down the production of natural testosterone production. This explains its potential application as a potential male contraceptive.
2. PROSTATE SHRINKAGE
Studies showed a decrease in prostate size which is the opposite effect seen when compared to lab results using testosterone and other SARMs.
3. DARKER URINE
Darker urine was noted on test subjects taking S23 SARM. This returned to normal urine color once the experiments ceased.
In conclusion, S23 SARM has proven to be an extremely powerful SARM with enormous scientific potential with hopeful future human applications. As of now you can only buy S23 SARM for research purposes only and not for human consumption.