Anabolic-androgenic steroid
Testosterone
Also known as Cypionate / Enanthate / Propionate.
What it is
The primary male androgen. Injectable forms are esterified — the ester (propionate, enanthate, cypionate, undecanoate) changes the release rate and half-life.
Used for
The foundation of most TRT and performance protocols. Ester choice drives injection frequency.
Half-life
Propionate ~2 days · Enanthate ~4.5 days · Cypionate ~8 days
Handling
Oil-based; store at room temperature. Warm the vial and draw with a larger needle, inject with a finer one.
Watch for
Aromatizes to estrogen; can raise hematocrit. Bloodwork tracking matters.
Educational reference only — not medical advice, not a recommendation to use Testosterone.