Also known as
Propionate Testosterone
Propionate testosterone is an injectable form of the hormone. It is sold here under two distinct brand names, Prime and Magnus. Both products contain 250 mg per 10 ml vial and share the same underlying active compound. This page exists to clarify that these are not different substances but rather separate manufacturer options for the identical molecule. Buyers should note the specific brand they are purchasing, as this is the only difference between the two listings.
Compound and Brand Distinctions
The Prime and Magnus versions of this injectable are chemically identical. They differ only in the manufacturer's identity. This is a critical point for any user comparing these two options, as there are no other variables to consider. The injectable nature of this testosterone propionate means it has a short half-life, which dictates the frequency of administration. Users should be aware that they must dose frequently to maintain stable blood levels. This is not a long-acting ester and requires careful attention to the dosing schedule.
Safety and Monitoring
Users of this injectable compound must be aware of its impact on liver function. It is a 17-alpha-alkylated molecule, which places significant strain on the hepatic system. This means that regular blood-work is essential for anyone using it. The short half-life and frequent dosing requirement mean there is no margin for error in the administration protocol. Age is another factor; this product is intended for those 21 years and older. A proper post-cycle therapy (PCT) is mandatory after any course of use to allow hormonal function to recover.
Active ingredient
Testosterone Propionate
Anabolic Steroid (Injectable)
Questions & answers
What are the key differences between Prime and Magnus?
The only difference is the manufacturer. Both contain 250 mg of testosterone propionate per 10 ml vial.
Why does this product require frequent dosing?
Its short half-life means it must be administered frequently to maintain stable blood levels in the body.
Is post-cycle therapy required after use?
Yes, a proper PCT is mandatory following any course of use to allow hormonal function to recover fully.