ADELPHI RESEARCH PRIMO 100

Adelphi Research Primobolan (Methenolone Enanthate) 100mg/ml is the mildest injectable steroid available, favoured by users who prioritise health markers, minimal side effects, and retainable lean gains over raw mass. With an anabolic rating of 88 and an androgenic rating of just 44, Primobolan provides moderate muscle-building effects with an exceptionally low risk of oestrogen-related, androgenic, and hepatic side effects. It does not aromatise, does not cause water retention, and produces no liver stress.

Why Primobolan Is the “Gentleman’s Steroid”

Primobolan’s reputation rests on what it does NOT do rather than what it does. It does not aromatise (zero gynecomastia risk, zero water retention). It has very low androgenic activity (minimal hair loss risk, minimal acne). It does not stress the liver (injectable). It produces moderate but highly retainable lean gains. For users who want to improve their physique without the aggressive side-effect burden of Trenbolone, Nandrolone, or high-dose Testosterone, Primobolan delivers a gentler but still effective experience.

The trade-off is potency and cost. Primobolan is less powerful milligram-for-milligram than most other injectables, meaning effective doses are higher (400-600mg/week) and cycle costs are correspondingly higher. It is not a mass builder. Users expecting Dianabol-like rapid gains will be disappointed. But every kilogram gained on Primobolan is lean, dry, and retainable after PCT.

Suggested Protocol

• Men (cutting/lean bulk): 400-600mg per week for 12-16 weeks
• Women: 50-100mg per week for 8-12 weeks (one of the few injectables considered viable for female athletes)
• Always run with a testosterone base (men): Test E at 200-300mg/week
• No AI needed: Primobolan does not aromatise
• PCT start: 14 days after last injection
• PCT: Nolvadex 40/40/20/20mg for 4 weeks

Key Facts

• Active ingredient: Methenolone Enanthate 100mg/ml
• Manufacturer: Adelphi Research
• Anabolic / Androgenic: 88 / 44
• Half-life: 7-10 days (Enanthate ester)
• Aromatisation: none
• Liver toxicity: none
• Suitable for women: yes (at reduced doses)

Also available: Pharmaqo Primobolan Depot 100mg. Browse all injectable steroids. Read our Beginner’s Guide.