Susta 500 is a name for a black-market injectable anabolic-androgenic steroid (AAS) that contains a blend of four different testosterone esters at a high concentration of 500 milligrams per milliliter (mg/ml). It is an illegally manufactured and unregulated product that is not approved for human medical use.
The name is derived from the legally produced, medically regulated drug Sustanon 250, which contains the same blend of testosterone esters but at a lower, controlled concentration.
Composition
Susta 500 is a testosterone blend typically containing four esters that release testosterone at different rates:
- Testosterone propionate (fast-acting)
- Testosterone phenylpropionate (medium-acting)
- Testosterone isocaproate (medium-acting)
- Testosterone decanoate (long-acting)
The combination of these esters is designed to create a rapid spike in testosterone levels followed by a sustained release over several weeks.
Risks of illegal use
As an unregulated, black-market product, Susta 500 poses significant health risks due to its potent dose and unknown manufacturing standards.
Medical and legal status
- Illegal: Without a valid prescription, testosterone use is illegal in many countries.
- Unregulated: The product’s actual concentration, purity, and sterility are not verified. This can lead to incorrect dosages, contamination, and infection.
- Banned in sports: Testosterone is banned by the World Anti-Doping Agency (WADA) and other sports federations.
Health effects
The high dosage in Susta 500 intensifies the side effects associated with testosterone misuse.
- Cardiovascular: High blood pressure, high cholesterol, increased risk of heart attack, stroke, and blood clots.
- Hormonal: Suppression of natural testosterone production, leading to testicular shrinkage, infertility, and gynecomastia (male breast development).
- Psychological: Severe mood swings, increased aggression (“roid rage”), paranoia, and depression.
- Androgenic: Severe acne, oily skin, and accelerated male-pattern hair loss.
- Virilization in women: Irreversible masculine features, such as a deepened voice and clitoral enlargement.





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