Methenolone Enanthate (Primobolan Depot)
Also known as Primo, Primobolan, Methenolone
A mild, well-tolerated injectable known for slow lean gains and one of the gentler side effect profiles.
Anabolic steroid — not a peptide
This compound is an anabolic steroid, not a research peptide. It has a different risk profile, legal status, and side-effect spectrum. The information here is for education only and is not medical advice or a recommendation to use. Read the medical disclaimer.
How it's taken (route)
a deeper shot into a muscle, usually the glute, thigh, or shoulder
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- Documented dose
- 300–600 mg
- Typical frequency
- Once or twice per week
- Cycle
- 12 weeks on, 12 off
- Half-life
- Roughly 10 days
- Common vial sizes
- 100 mg, 200 mg
- Regulatory status
- Controlled anabolic steroid (Schedule III in the US). Prescription only.
Dose on a U-100 syringe
This dose is too large to draw in one standard U-100 insulin syringe at common mixes. It is typically drawn from a larger vial, mixed at a higher concentration, or split into more than one injection. Run your own vial through the reconstitution calculator.
What it does
Primobolan is prized for quality rather than quantity - slow, lean, keepable gains with minimal water retention and relatively mild side effects. Because it is mild, effective doses tend to be high, which makes it expensive and one of the most commonly faked compounds on the market.
Mechanism
DHT-derived anabolic with low androgenic activity that does not aromatize. Mild androgen receptor agonism with modest suppression compared with most steroids.
Storage — lyophilisedwhat's this?
Oil solution: room temperature, away from light.
Storage — reconstitutedwhat's this?
Keep the vial clean and use within the labelled shelf life.
Reconstitution noteswhat's this?
Ready to inject in oil. Verify sourcing - counterfeits are widespread.
Commonly reported side effects
- Hair loss in predisposed people
- Mild HDL reduction
- Suppression of natural testosterone
- Acne (less common than with harsher compounds)
Contraindications noted
- Male pattern baldness sensitivity
- Prostate concerns
- Cardiovascular disease
- Pregnancy or breastfeeding
- Under 21 years of age
Research notes
Historically used medically in Europe. Mild profile but still suppressive - it is not a free pass, and it still requires bloodwork.
Vendors carrying Methenolone Enanthate (Primobolan Depot)
These research suppliers list this compound. Prices, vial sizes and testing vary — always check the current lot certificate before you buy.
Peptide Streak does not sell peptides and is not affiliated with these vendors. Some list metabolic compounds under coded product names.