Researches 

S23 is currently under development for potential use as a male hormonal contraceptive. It is still in the pre-clinical development phase, which means it has only been tested in animals and not in humans. Preclinical data showed that S23 was the most developmentally suppressive SARM and resulted in infertility in all treated rats. This is expected to spark interest in its potential clinical use as a form of male birth control.

PEDs users opinion 

S23 is becoming increasingly popular in the bodybuilding community for its powerful muscle building and body composition recomposition effects. Users of PEDs claim that S23 is a more powerful alternative to S4 without the side effect associated with vision. S23 has also been shown in studies to reduce prostate size, which is the opposite of a very common negative side effect of anabolic steroids (prostate enlargement). However, these data are commonly misinterpreted as all SARMS prevent prostatic hypertrophy in a dose-dependent manner.

Effects of Beligas S23 (Mastorin) (Mastorin)

• High efficiency in building muscle mass and strength
• Increase in productivity

Side effects 

•  High degree of suppression of own testosterone
•  There are anecdotal reports of poor sleep and irritability as with trenbolone.

Effect on the liver

There are currently no studies regarding S23 and liver toxicity. While this is the strongest SARM in existence, it should technically be more liver-friendly than YK11 since it doesn’t have as many methylated groups.

Testosterone suppression 

S23 is considered to be the most suppressive testosterone SARM on the market.

Half-live 

• 12 hours

Dosage 

• Minimum working dosage (beginner) 10 mg
• Average dosage 15-30 mg
• Maximum recommended 50 mg
• Women 5-10 mg