Deca Durabolin is most commonly injected once per week at a dosage of 400 mg. With this amount, estrogen conversion is slight so gynecomastia is usually not a problem. Also uncommon problems using deca nandrolone decanoate are with liver enzymes, blood pressure or cholesterol levels. At higher dosages, side effects may become increasingly more frequent, but this is still a very well tolerated drug. Deca should also be noted that in HIV studies, nandrolone decanoate has been shown not only to be effective at safely bringing up the lean bodyweight of patient but also to be beneficial to the immune system. For bodybuilding, Deca Durabolin can effectively be incorporated in both bulking (mass) and cutting cycles. It is good in combination with Sustanon and Dianabol.