S-4 (also known as Andarine or GTX007) is a selective androgen receptor modulator (SARM) that has received extensive attention in the fields of bodybuilding and strength training. It is produced by meditech Medical Technology Company and is designed to treat diseases such as osteoporosis. However, due to its potential role in promoting muscle growth and fat reduction, the S-4 is used by bodybuilding enthusiasts to enhance physical fitness and improve body shape.
The function of GTX007
Increase muscle mass and strength: S-4 promotes protein synthesis by binding to androgen receptors in muscles and bones, thereby increasing muscle mass and strength. Users reported that during the period of using S-4, muscle density and hardness increased.
Promoting fat reduction: S-4 has the effect of promoting fat oxidation, which helps to reduce body fat, especially when diet is controlled and appropriate training is provided. Therefore, it is often used in fat-loss cycles to achieve a more slender figure.
Improving bone density: S-4 helps enhance bone strength and increase bone density, which has potential benefits for preventing problems such as osteoporosis.
Improving muscle hardness and contours: Users have reported that the S-4 can increase muscle hardness and clarity, making muscle contours more distinct.
The usage method of ANDARINE
Dosage recommendation
Beginner dosage: It is recommended to start with 25 milligrams per day to observe the body's response.
Regular dosage: Experienced users usually take 50 milligrams per day.
High dose: Some users take up to 75 milligrams daily, but this may increase the risk of side effects, especially vision-related problems.
Cycle length
Standard cycle: Usually 6 to 8 weeks.
Beginner cycle: It is recommended to start from 4 to 6 weeks to observe the body's response and reduce the risk of side effects.
Administration time: As the half-life of S-4 is relatively short (about 4 hours), it is recommended to divide the daily dosage into 2-3 doses to maintain a stable drug concentration in the blood.
Combined use with other SArms: The S-4 is often used in combination with other SArms (such as Ostarine or LGD-4033) to enhance the effect. However, combined use may increase the risk of side effects. It is recommended to do so under the guidance of professionals.
Post-treatment therapy (PCT) : As S-4 may inhibit the production of natural testosterone, it is recommended to perform PCT after the cycle ends to restore the hormonal balance in the body. Commonly used PCT drugs include Clomid or Nolvadex.

