Methasterone

Pro-Primobolan 25mg: 50 tablets, 25mg each


Active Ingredient: Methenolone Acetate

Tablet Count: 100 Tablets

Half-Life: 4-6 Hours

Classification: Oral Anabolic Steroid

Dosage: 50-150 mg/day

Acne: Low

Water Retention: Low

Hepatotoxicity: Moderate

Aromatization: None


Pro Primobolan 25mg contains Methenolone Acetate, an esterified anabolic steroid that is designed to be less hepatotoxic compared to methylated steroids. Here’s how it manages to survive the first-pass metabolism by the liver and maintain its efficacy without causing the same level of liver toxicity:


Esterification and Absorption

Esterification: Pro Primobolan 25mg is esterified, which means a carboxylic acid ester is attached to the methenolone molecule. This modification allows the steroid to be gradually released into the bloodstream after administration.


Absorption and Metabolism: When Pro Primobolan is ingested, the esterified methenolone is absorbed through the gastrointestinal tract and enters the bloodstream. Unlike methylated steroids, which are designed to survive the harsh environment of the digestive system and first-pass liver metabolism, esterified steroids like methenolone acetate are more efficiently processed by the body with less strain on the liver.


Reduced Hepatotoxicity

Non-Methylation: Methenolone Acetate is not a C17-alpha alkylated steroid (methylated), which is a common modification in oral steroids to increase bioavailability but also increases liver toxicity. This lack of alkylation reduces the strain on the liver.

Gradual Release: The esterification process ensures that the active steroid is released slowly and steadily into the bloodstream.

Metabolic Pathway: Once in the bloodstream, esterified steroids like methenolone acetate are broken down by enzymes into the active hormone, which then exerts its anabolic effects without the same level of liver processing required for methylated steroids.

Efficacy and Safety

Protein Synthesis and Nitrogen Retention: Methenolone Acetate effectively enhances protein synthesis and nitrogen retention, promoting muscle growth and recovery with fewer side effects on the liver.

Lower Androgenic Effects: Pro Primobolan 25mg has a favorable anabolic-to-androgenic ratio, providing substantial muscle-building benefits with minimal androgenic side effects.


Pro Primobolan 25mg is an effective and safer alternative for athletes and bodybuilders looking for performance enhancement without the significant liver toxicity associated with methylated steroids. By utilizing esterification instead of methylation, it maintains high efficacy while reducing the risk of liver damage.