Primobolan (Metenolone)
Mild DHT derivative. Injectable (enanthate) or oral (acetate, 1-methylated, not 17α-alkylated). Considered one of the safest AAS.
Overview
Mild DHT derivative. Injectable (enanthate) or oral (acetate, 1-methylated, not 17α-alkylated). Considered one of the safest AAS.
Mild lipid impact (less than most AAS), minimal liver stress (injectable), does not aromatize, moderate HPTA suppression. Oral form is 1-methylated rather than 17-alpha alkylated, so it carries far less liver stress than classic orals.
Compound Guide
Ester: Enanthate (injectable, 7-carbon chain) or Acetate (oral, 1-methylated, not 17-alpha alkylated).
Dosage:
- Injectable (Enanthate): 400-800 mg/week for 12-20 weeks
- Oral (Acetate): 50-100 mg/day for 6-8 weeks (less common; still worth checking ALT/AST)
Injection Protocol:
- Injectable: 2x/week IM, 25g needle, glutes/VG/delts
- Oral: split dose 2x/day
Key Notes:
- Considered the mildest injectable AAS -- minimal side effects at moderate doses
- Does not aromatise -- no E2 increase, no water retention
- Many users report lower E2 after adding it, but no study has shown it blocks aromatase: Does Primobolan lower estrogen? What users' bloodwork shows
- Mild but consistent lean gains; popular for "lean bulk" or recomp
- Relatively gentle on lipids compared to other AAS (but still worsens HDL)
- Requires higher doses than most AAS for noticeable effects (400mg+ weekly)
- Often expensive due to high demand and frequent counterfeiting
- Good option for users prioritising health alongside enhancement
Where primo sits in the compound rankings for lipid damage, and the recovery timeline: How to protect your cholesterol on steroids.
Usage History
Pairs With
How Primobolan (Metenolone) behaves when it is run alongside other compounds.
Commonly stacked with
Stacks the risk
Marker Interactions
Compare With
Frequently Asked Questions
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Quick Reference
Category
AAS
Half-Life
5-7 days (injectable) / 4-6 hours (oral)
Detection Time
5 months