Nandrolone Decanoate (Deca Durabolin) is a highly anabolic steroid with very few androgenic properties, which means that it provides outstanding gains with very few undesirable side effects when used responsibly. This off-season compound does not add weight as quickly as some others do, and it has a relatively long half-life since it continues to release into the body for a period of up to three weeks. Some steroids add weight quickly, but a lot of that weight is water. Deca Durabolin results are different. The gains come slower, but they are of higher quality. To offset the slow-acting nature of Deca, many bodybuilders kick-start their cycles with a faster acting compound like Dianabol.