Masteron 100 from Xeno Labs is an injectable steroid—Drostanolone Propionate, 100mg per ml, packed in a 10ml vial.

What It Is
Drostanolone Propionate (C23H36O3) is a short-ester DHT derivative that hits fast and packs a punch. It doesn’t convert to estrogen, so you skip the water retention and gyno. The carrier oil’s usually grapeseed. Half-life? About a day, day and a half. You’ll feel it peak within 24 hours after you pin it.

How People Use It
Doctors once used it for breast cancer thanks to its anti-estrogen effects. These days, bodybuilders reach for Masteron when they want to get lean, harden up, and dial in definition—especially before a show. It’s a favorite to stack alongside Testosterone Propionate, Trenbolone Acetate, or Winstrol for that vascular, grainy look.

What You Get Out of It
Muscles look dense and 3D, not puffy. No water bloat. No risk of gyno. Masteron lowers SHBG, so your free testosterone goes up if you’re stacking. Strength and aggression get a boost, and it helps you burn fat. It acts fast, perfect for short cycles. The best part? No liver toxicity.

Side Effects
Acne’s common. So’s hair loss if you’re sensitive to DHT, plus your joints might feel dry or achy. HDL cholesterol can drop. Bigger risks: enlarged prostate, testosterone shutdown, mood swings, and heart strain. You’ll need to inject often. For women, virilization is a real risk.

How to Dose and Use It
Most guys run 300–700mg a week—split into 100mg every other day, injected into glutes or delts with a 25–27G 1” needle. Beginners usually stick to 300mg per week; advanced users push 500–700mg. Typical cycle runs 6–10 weeks. Always use testosterone as a base. Start PCT three days after your last shot: Clomid (50/50/25/25) and Nolva (40/40/20/20).

Sample Cycles
Beginner Cut: 300mg Masteron Propionate + 400mg Testosterone Propionate for 8 weeks.

Intermediate: 400mg Masteron P + 400mg Test P + 50mg Winstrol every day, 8 weeks.

Advanced: 500mg Masteron P + 500mg Test P + 400mg Trenbolone Acetate, 10 weeks.

Solo Pre-Contest: 100mg every day for the last 4 weeks (with a testosterone base).

Bridge: 200mg per week with a TRT dose of testosterone.