Your Cart is Empty

Back To Shop

Methosarb (Calusterone) Steroid Profile

Background and Development

Methosarb, also known as Calusterone, is an oral anabolic steroid derived from testosterone. It was first developed in the 1960s by Upjohn Pharmaceuticals. Methosarb was initially created as a synthetic androgen with potential applications in hormone replacement therapy and treatment of various medical conditions.

Chemical Structure

Methosarb is a synthetic derivative of testosterone, with modifications to its chemical structure to enhance its anabolic properties and reduce its androgenic effects. It belongs to the 17-alpha-alkylated group of steroids, which allows for oral administration without rapid breakdown in the liver.

Methosarb (Calusterone) Steroid Profile
Methosarb (Calusterone) Steroid Profile

Mechanism of Action

Methosarb exerts its effects by binding to androgen receptors in target tissues, including muscle cells. This interaction activates specific cellular pathways, leading to increased protein synthesis and nitrogen retention. These mechanisms promote muscle growth and recovery while reducing muscle breakdown.

Anabolic/Androgenic Ratio:

The anabolic/androgenic ratio of Methosarb is approximately 100:30, making it a moderately potent anabolic steroid with reduced androgenic effects compared to testosterone. This profile suggests that it is more anabolic than androgenic, contributing to its muscle-building capabilities.

Dosages and Administration

Methosarb is typically administered orally, making it convenient for users who prefer avoiding injections. Dosages can vary depending on the individual’s experience level, goals, and tolerance to the compound. For performance enhancement, dosages typically range from 10 to 30 mg per day. However, it is essential to start with a lower dosage and gradually increase it to assess how the body responds and to minimize the risk of side effects.

Effects and Benefits

The use of Methosarb is associated with several benefits for athletes and bodybuilders:
Muscle Growth: Methosarb promotes protein synthesis and nitrogen retention, leading to significant muscle hypertrophy and gains in lean muscle mass.

Strength Gains: Users often experience improvements in strength and power, allowing for more intense and productive workouts.

Enhanced Recovery: Methosarb may accelerate the recovery process, reducing downtime between training sessions and promoting faster muscle repair.

Improved Endurance: Some users report increased endurance and stamina, enabling longer and more productive workouts.

Potential Fat Loss: While not primarily a fat-burning steroid, Methosarb’s anabolic properties may contribute to a more favorable body composition when combined with a proper diet and exercise regimen.

Side Effects and Health Risks

As with any anabolic steroid, the use of Methosarb is not without potential side effects. Some common side effects associated with its use include:

Androgenic Side Effects: Users may experience acne, increased body hair growth, and the risk of androgenic-related conditions.

Hepatotoxicity: As an oral 17-alpha-alkylated steroid, Methosarb can exert stress on the liver, potentially leading to liver toxicity with prolonged or high-dose use.

Cardiovascular Effects: Methosarb may negatively affect cholesterol levels, leading to an increase in LDL (bad cholesterol) and a decrease in HDL (good cholesterol).

Hormonal Imbalances: Like all exogenous steroids, Methosarb can suppress the body’s natural testosterone production, leading to hormonal imbalances. Post-cycle therapy (PCT) is often necessary to restore hormonal function after completing a cycle.

Virilization in Women: Due to its androgenic nature, Methosarb is not recommended for female use, as it can cause masculinizing side effects.

Legal Status

Methosarb is not a widely available or commonly used steroid today. It is not approved for human use in most countries and is considered a controlled substance in many regions. Its use for performance enhancement in sports is banned by various athletic organizations. As with any controlled substance, it is crucial to be aware of and comply with the laws and regulations governing the use of Methosarb in your jurisdiction.


Methosarb (Calusterone) is a moderately potent anabolic steroid known for its muscle-building properties and potential benefits in improving athletic performance. However, it is not without potential side effects, and responsible use is essential to minimize health risks. As with all anabolic steroids, it is crucial to prioritize health, follow recommended dosages, and seek professional guidance when using Methosarb to achieve desired results safely.


Your Cart is Empty

Back To Shop