SP-Laboratories PROPIONATE



Package:1 vial (100mg/ml 10 ml)
Active Substance: Testosterone Propionate
Product name: Testosterone Propionate, Propionate, Test P


Testosterone Propionate, commonly referred to as Test P, is an injectable form of the hormone testosterone. Manufactured by SP-Laboratories, Test P is widely used in both medical settings and the realm of bodybuilding and sports. In this article, we will delve into the general description, indications, contraindications, uses in bodybuilding and sport, medical actions, combination with other drugs, dosage, and potential side effects of Test P.

General Description:

Testosterone Propionate is a synthetic version of the naturally occurring male sex hormone, testosterone. It is designed to be administered through intramuscular injections. The propionate ester attached to the testosterone molecule allows for a slower release into the bloodstream, extending the duration of its effects compared to other forms of testosterone.


In a medical context, Testosterone Propionate is prescribed to treat conditions resulting from low levels of testosterone, such as hypogonadism and delayed puberty in males. It helps to promote the development of secondary sexual characteristics, maintain bone density, and improve overall well-being.


However, there are certain situations in which the use of Testosterone Propionate is contraindicated. Individuals with a history of prostate or breast cancer, high blood pressure, liver or kidney disease, and cardiovascular issues should exercise caution or avoid its use altogether. Pregnant and breastfeeding women should also avoid Test P due to potential masculinizing effects on the fetus or infant.

Uses in Bodybuilding and Sport:

In the realm of bodybuilding and sports, Test P is highly favored due to its ability to enhance muscle growth, strength, and performance. Athletes often use it during bulking cycles to gain lean muscle mass and improve recovery times. The anabolic properties of Test P can contribute to increased protein synthesis and nitrogen retention in muscles, leading to enhanced muscle development.

Medical Action:

Testosterone Propionate exerts its effects by binding to androgen receptors in various tissues, including muscle cells. This binding stimulates the production of proteins, ultimately leading to increased muscle mass and strength. Moreover, Test P aids in reducing muscle catabolism, thus facilitating a more rapid recovery after intense workouts.

Combination with Other Drugs:

In bodybuilding circles, Test P is frequently combined with other anabolic steroids to achieve specific goals. It’s commonly stacked with compounds like Trenbolone and Winstrol to enhance cutting phases, where the aim is to reduce body fat while preserving muscle mass. The choice of combinations depends on an individual’s goals, experience, and tolerance to different compounds.


Dosage recommendations for Testosterone Propionate can vary based on the individual’s experience level, goals, and tolerance. In medical settings, dosages typically range from 25 to 50mg every two to three weeks. In bodybuilding, dosages can be significantly higher, ranging from 100 to 200mg every other day. However, it’s crucial to note that higher dosages increase the risk of side effects.

Side Effects:

Like any medication or anabolic compound, Testosterone Propionate is not without potential side effects. Common side effects include acne, oily skin, hair loss, and an increase in aggression. More serious potential side effects involve cardiovascular issues, suppression of natural testosterone production, and liver strain. Proper monitoring, post-cycle therapy, and responsible use are essential to mitigate these risks.


Testosterone Propionate, or Test P, manufactured by SP-Laboratories, offers a versatile compound with both medical and performance-enhancing applications. Its ability to boost muscle growth, strength, and overall performance has made it a staple in the world of bodybuilding and sports. However, it’s crucial to approach its use responsibly, considering the potential side effects and contraindications. Whether prescribed for medical reasons or used in the pursuit of fitness goals, Test P remains a powerful tool that demands respect and careful consideration. Always consult with a medical professional before starting any new regimen involving Testosterone Propionate.