Masteron P 100 (Drostanolone Propionate 100 mg/ml)

Masteron P 100 (Drostanolone Propionate 100 mg/ml) is Evolve Biolabs' short-ester, non-aromatising injectable, supplied as a 10 ml multi-dose vial. The fast propionate ester gives precise control of blood levels at the classic 100 mg/ml strength.

What Masteron P 100 Is

Drostanolone is a dihydrotestosterone-derived anabolic steroid, reduced at carbon five and therefore unable to aromatise. That structure produces a strongly androgenic, dry profile with no oestrogen conversion. The propionate ester is short, so the compound is released and cleared within days rather than weeks. Masteron P 100 supplies 100 mg per millilitre in a 10 ml vial, for 1,000 mg total.

The History of Drostanolone

Drostanolone was developed in the late 1950s and 1960s and marketed as Masteron, chiefly for breast cancer palliation in postmenopausal women. It was studied as endocrine therapy in an era when few options existed, and objective responses were documented in a subset of patients. It was later superseded in oncology but survived in physique research, where its dry, non-aromatising character made it a reference compound for cutting protocols.

How It Works

After intramuscular injection, esterases rapidly hydrolyse the propionate group, releasing free drostanolone over roughly two to three days. The hormone binds the androgen receptor with high affinity and is not aromatised, so it does not raise oestradiol or cause oestrogen-driven water retention. It is metabolised in the liver and excreted mainly in urine. The short ester allows rapid adjustment and rapid washout, which is its main advantage over long-ester androgens.

What the Research Shows

• Drostanolone was studied clinically as endocrine therapy in breast cancer.
• Its lack of aromatisation and strong androgen-receptor binding are well documented.
• The propionate ester is established as a fast-release prodrug.
• Androgenic effects on skin, hair and sebaceous glands are consistently described.

Research Context

Because drostanolone is a reduced androgen, its effects on sebaceous glands and hair follicles are more pronounced than its anabolic ratio alone would suggest, and skin and hair are recurring endpoints in the literature. Analytical chemists have characterised its urinary metabolites, and the short propionate ester produces a shorter detection window than the enanthate form. Those two facts, strong androgenic signalling and rapid clearance, define how drostanolone is studied.

Strength, Pack and Authentication

Each millilitre contains 100 mg of drostanolone 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' manufacturing records.

Buying Masteron P 100 Online

Short-ester Masteron is one of the most searched dry injectables. If you are researching drostanolone propionate, comparing Masteron P 100 products or looking to buy Masteron P 100 online from a verified Evolve Biolabs supplier, this page gives you the full specification, pack size, price and live stock status. Browse more Evolve Biolabs injectables at NotNatty.