S-23 is a selective androgen receptor modulator of the 6th generation. It binds only to androgen receptors in bones and muscles. It is one of the most powerful SARMs and is used by athletes to build muscle mass, reduce adipose tissue, and improve muscle relief. Does not retain water and increases bone strength.

S-23 is a non-steroidal drug belonging to the class of selective androgen receptor modulators of the 6th generation. In its effect on the growth of muscle tissue, it is comparable to powerful AAS and surpasses other SARMs, such as RAD-140, Ostarine, Andarine and others.

The drug was developed for people suffering from muscle and bone exhaustion. S-23 binds only to androgen receptors in bones and muscles.

It is used by athletes to build muscle mass, reduce adipose tissue, improve muscle relief.


Scientific research and practical experience of using S-23 by athletes show that it is one of the most powerful, if not the most powerful, SARMs, which:

  1. Increases and strengthens muscle mass.
  2. Increases strength, endurance and reaction speed.
  3. Increases bone strength.
  4. Reduces adipose tissue.
  5. Prevents muscle wasting.
  6. Does not retain water.
  7. Improves muscle relief.

Due to its properties, the drug is popular among athletes of various sports, such as bodybuilding, boxing, wrestling, mixed martial arts. Among bodybuilders, the drug is often used during "fat burning", because it practically does not retain water and helps to retain the gained muscle mass.

The half-life of S-23 is 12 hours, therefore, to have a stable level of the drug in the blood, the daily dosage of the drug should be divided into 2 doses: in the morning after breakfast and in the evening after dinner.

The peak level of the drug in the blood is reached after 4 hours.

The bioavailability of the drug is 96%.

Course and dosages

  1. Building muscle mass:

The daily dosage is:

- 10 mg for athletes weighing up to 80 kg.

- 15-20 mg for athletes weighing more than 80 kg.

The duration of the course is 6-12 weeks.

To achieve high results, it is necessary to increase the daily intake of proteins (at least 3 g per 1 kg of body weight), consume enough calories, and also have intensive workouts with large weights.

After 2 weeks of the course, you will see an increase in strength indicators and muscle mass.


Please note that the drug reduces the natural production of testosterone, so after the course it is necessary to conduct post-course therapy (PCT) to quickly restore testosterone levels in the body to maintain the gained muscle mass.

Use by women

There is no risk of virilization and women can safely use this drug.