Primobolan (methenolone)
Muscle Building · Injectable/oral anabolic
Tier C+
What this is
Famously favored by Arnold Schwarzenegger. Mild profile makes it popular for women and for 'clean' cutting cycles, but correspondingly slow gains. Extensively counterfeited due to expense of genuine product.
Mechanism
DHT derivative; mildly anabolic, non-aromatizing; oral acetate form (methenolone acetate) or injectable enanthate; historically used in premature infants and osteoporosis
Dose & route
Injectable: 200-600 mg/week; oral: 50-100 mg/day
Citations
- https://pubmed.ncbi.nlm.nih.gov/15705014/
- https://pubmed.ncbi.nlm.nih.gov/8624417/
- https://pubmed.ncbi.nlm.nih.gov/27036153/
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This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.