Primo 100 - it is an injectable version of Methenolone which causes a slow and gradual release from the site of injection. Primo 100 itself is a along acting anabolic with extremely low androgenic properties. On the same note the anabolic effect is also quite mild, its potency considered to be slightly less than decabolin 300. This drugs is most common used during a cutting cycles when a mass increase is not the main objective. It also helps to prevent muscle mass lost during diet. Some athletes prefer to combine it with d bol, oxymetholone or testosterone however, presumably to lower the overall androgen dosage and minimize uncomfortable side effect.
Primo 100 does not convert to estrogen. So the side effect related to estrogen is not a concern while using this drug. Basic androgenic side effects are oily skin, acne, body or facial hair growth, aggression and accelerated hair loss.