The ester of this compound, it is slow action, and therefore means that injections can be less frequent. Bodybuilders using this steroid often follow a two to three shot regimen per week.Primobol, as it is often called, is a very popular steroid among bodybuilders who are in the “cut” phase of their training and dieting. This steroid is very mild in nature and seems to work perfectly with restricted dieting diets. Primobol will not aromatize in the body, so estrogenic side effects such as bloating should not be a concern. Bodybuilders with reasonably low body fat will notice an increase in definition and lean muscle mass. Primobolan would have been a long time favorite of the great Arnold Schwarzenagger. The use of Arnold’s many attribute this medicine to its ability to keep such a small physical and aesthetic size looking. Primobol is also very popular in “transition” steroids, which means that bodybuilders sometimes use a regular dose of it between their regular cycles to keep the body in a more natural anabolic state, but while not keeping testosterone Naturally closed as hard as some other steroids will do. Those looking to use Primobolan in a cycle could pile up with a low dose of testosterone and such oral Stanozolole or Oxandrolone. Primobol is also a very popular steroid among women bodybuilders where it is low androgenic properties and the light nature makes it a very safe choice for them to use. Male bodybuilders often use Primobol at a dose of 300-800mgs a week, ranging from 8-16wks, while women find that the dose of 50-100mg will usually give desirable results. Side Effects (very few) Side effects of Primobol when taking very high dosage: body hair growth, facial hair growth, unusual hair loss, voice deepening, acne, oily skin, suppression of natural testosterone production.