Nandrolone Decanoate, also known as Deca-Durabolin and mostly as Deca, is an anabolic steroid. Deca-Durabolin is specifically the trade name for the anabolic steroid Nandrolone Deconoate – this is the longer ester variant of the Nandrolone hormone. Deca-Durabolin is one of the most popular injectable anabolic steroids used today. Deca is primarily used for bulking and mass gaining phases due to the increase in nitrogen retention (bloat) the compound will cause. Strength gaining cycles and for those wanting to add weight to their frame can utilise Deca-Durabolin with a Testosterone variant for optimal gains.