Methenolone Enanthate (Primobolan)
Primobolan — a milder DHT-derived anabolic with a low-side-effect reputation. Still suppressive.
- Half-life
- 5.0 d
- Out of system
- ~4 weeks
- Route
- Intramuscular
- Level
- Advanced
Long-acting — weekly dosing keeps levels steady. After the last dose, roughly 97% has cleared in ~4 weeks (five half-lives) — the window that matters for washouts, bloodwork and surgery.
What Methenolone Enanthate (Primobolan) is used for
- Mild DHT-derived anabolic — low water retention, so gains read as lean tissue
- Does not aromatise, so oestrogenic side effects (gyno, bloat) are not a factor
- Long-standing reputation for being tolerable at moderate doses relative to stronger androgens
How it's typically used
Research range: 300–600 mg intramuscular per week, split into two shots, over 8–12 weeks. Almost always run alongside a testosterone base rather than alone.
What to watch for
- Still fully suppressive — natural testosterone shuts down and needs an exit plan (PCT or ongoing replacement)
- Its mild reputation drives long runs at high doses, which is where the lipid and haematocrit damage happens
- Blunts HDL and can raise haematocrit; bloodwork before, during, and after is the minimum
- A controlled substance in most countries and heavily counterfeited — Primobolan is one of the most faked compounds on the market
Common questions
- What is the half-life of Methenolone Enanthate (Primobolan)?
- Methenolone Enanthate (Primobolan) has an approximate elimination half-life of 5.0 d. Long-acting — weekly dosing keeps levels steady.
- How long does Methenolone Enanthate (Primobolan) stay in your system?
- Roughly 97% of a dose has cleared after five half-lives — about ~4 weeks for Methenolone Enanthate (Primobolan). That is the window that matters for washouts, bloodwork and surgery.
- How is Methenolone Enanthate (Primobolan) taken?
- Methenolone Enanthate (Primobolan) is typically administered by the intramuscular route. Research range: 300–600 mg intramuscular per week, split into two shots, over 8–12 weeks. Almost always run alongside a testosterone base rather than alone.
- What are the risks of Methenolone Enanthate (Primobolan)?
- Still fully suppressive — natural testosterone shuts down and needs an exit plan (PCT or ongoing replacement) Its mild reputation drives long runs at high doses, which is where the lipid and haematocrit damage happens Blunts HDL and can raise haematocrit; bloodwork before, during, and after is the minimum A controlled substance in most countries and heavily counterfeited — Primobolan is one of the most faked compounds on the market
About Androgens & steroids
- What they are
- Anabolic-androgenic steroids — testosterone and its derivatives. These are drugs, not peptides, and are controlled substances in most countries.
- How they're run
- Injected intramuscularly or subcutaneously on a schedule set by the ester's half-life; a few are oral and hepatotoxic.
- What to watch
- Every one of these shuts down your own testosterone production. Full bloodwork before, during, and after is not optional, and an exit plan — PCT or ongoing replacement — is part of the decision to start, not an afterthought.
Full guide
Methenolone Enanthate (Primobolan): A Tracking Guide for a "Mild" Anabolic
Often called gentle, but still suppressive and not risk-free. What "mild" actually means and what to monitor.
Other androgens & steroids
Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.