Keifei Primbolin 100 Methenolone Enanthate

Primbolin 100 — Methenolone Enanthate

Form: Injectable | Dosage: 100mg/ml × 10ml multi-dose vial or 1ml single-dose ampoule

Pharmaceutical Information

• Pharmaceutical name: Primbolin 100
• Chemical name: Methenolone Enanthate
• Dosage: 100mg/ml × 10ml multi-dose vial and 100mg/ml × 1ml single-dose ampoule

Packaging & Presentation

• 10ml multi-dose clear vial containing 100mg/ml Methenolone Enanthate, with Keifei® wording on the side. Sealed with a dark yellow flip-off cap imprinted with Keifei®. Each vial includes a QR Authentication Code. Packed 10 vials per white & darker-yellow outer box.
• 1ml single-dose ampoule containing 100mg/ml Methenolone Enanthate. Each ampoule is imprinted with three rings (green, red, green) and a green dot below. Packed in 10 ampoules (5×2) inside a plastic insert with Keifei® imprint. Outer box contains 100 ampoules (10 inner boxes × 10 ampoules). Each inner box carries its own QR Authentication Code.

Overview

Primbolin 100 is the injectable version of Methenolone designed for a slow, gradual release from the injection site. It is a long-acting anabolic with very low androgenic properties and a mild anabolic effect—often considered slightly less potent than Decabolin 300. Commonly used in cutting cycles to preserve lean mass during caloric deficit. Some athletes combine it with agents like D-bol, Oxymetholone, or Testosterone to reduce overall androgen load and minimize uncomfortable side effects.

Estrogenic Profile

Methenolone does not aromatize to estrogen, so estrogen-related side effects (water retention, gynecomastia) are generally not a concern.

Possible Side Effects

• Oily skin
• Acne
• Facial or body hair growth
• Aggression
• Accelerated hair loss (in predisposed individuals)