Also known as
Test P
Test P is a common shorthand for testosterone propionate, an injectable anabolic androgenic steroid. This short-ester form of testosterone is stocked by SynthesisGear in two distinct product listings, one from Prime and one from Magnus. Both offer the same 10ml/250mg vial format with a standard concentration of 25 mg/ml. Athletes and researchers use this compound to support muscle growth and strength, and its brief duration of action requires frequent dosing to maintain stable blood levels.
Compound and Product Details
Testosterone propionate is a fast-acting injectable. Its short ester chain means it has a brief half-life, necessitating daily or every-other-day administration to avoid significant peaks and troughs in serum levels. The two products available here are identical in their active ingredient, dose per ml, and volume. Buyers should focus on the specific brand—either Prime or Magnus—as this is the only differentiating factor between them.
Usage and Safety Considerations
Users report that testosterone propionate is a standard component of many cycle protocols. Its anabolic effects are well-documented, but it also carries the typical androgenic risks associated with this class of compounds, including potential estrogenic side effects due to its aromatization. Because of its short duration, careful attention to dosing schedules is required. As with all injectables in this category, appropriate post-cycle therapy (PCT) is strongly advised following a course of use.
Questions & answers
What are the differences between Prime and Magnus Test P?
There are no differences in the active ingredient, dose per ml, or vial volume. The only distinction is the manufacturer, which is either Prime or Magnus.
Why does Test P require frequent dosing?
Its short ester chain gives it a brief half-life, leading to rapid peaks and troughs in blood levels that necessitate daily or every-other-day injections.
What is the standard dose of Test P per ml?
The concentration is 25 mg/ml. A single 10ml vial contains a total of 250mg of testosterone propionate.