Test-p 100 (Testosterone Propionate 100 mg/ml)

Test-p 100 (Testosterone Propionate 100 mg/ml) is Evolve Biolabs' short-ester testosterone, supplied as a 10 ml multi-dose vial. Propionate releases and clears within days, giving the tightest control of any commonly used testosterone ester.

What Test-p 100 Is

Testosterone propionate is testosterone esterified with propionic acid, a three-carbon chain that is hydrolysed quickly after injection. That short ester produces a rapid rise in free testosterone and a rapid decline, with an active window measured in days rather than weeks. Test-p 100 provides 100 mg per millilitre in a 10 ml vial, for 1,000 mg total. The released testosterone is identical to the endogenous hormone.

The History of Testosterone Propionate

Testosterone propionate was one of the first testosterone esters to reach clinical use, introduced in the 1930s shortly after testosterone itself was synthesised. It was used for hypogonadism and wasting before longer esters made less frequent administration possible. In physique research it became the standard short-acting testosterone for protocols requiring precise control, and the 100 mg/ml strength remains the reference for short-ester testosterone.

How It Works

Propionate is cleaved quickly once the oil depot is in muscle, so free testosterone rises within a day and falls again over roughly two to three days. That narrow window allows dose changes to take effect without a long tail. The hormone follows the usual androgen-receptor, aromatase and 5-alpha reductase pathways, exactly like endogenous testosterone; only the timing differs.

What the Research Shows

• Testosterone propionate has been used clinically since the 1930s.
• Its short half-life is well characterised in pharmacokinetic studies.
• Research shows sharper peaks and faster clearance than enanthate or cypionate.
• The propionate ester is a standard tool when rapid washout is required.

Research Context

Short esters are valuable when a study needs rapid changes in hormone exposure. Propionate peaks within about a day and clears within a few days, which permits tight titration at the cost of frequent administration. It has been in clinical research since the 1930s and remains the reference short-acting testosterone. Rapid washout helps with acute-effect studies but works against designs that require weeks of stable levels.

Strength, Pack and Authentication

Each millilitre contains 100 mg of testosterone propionate, for 1,000 mg per 10 ml vial. The vial is filled under controlled conditions, sealed with a colour-coded flip-off cap and packed in a printed, tamper-evident carton stating the compound, strength and volume. A verification code on the packaging links the pack to Evolve Biolabs' records.

Buying Test-p 100 Online

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