While a Deca cycle is well-tolerated by most healthy adult men, side-effects are still possible, and they largely surround this steroids progestin nature and mild aromatizing nature. Although Deca-Durabolin only aromatizes at a rate of about 20% of testosterone, it still aromatizes; further, you're going to be supplementing with testosterone and possibly other steroids that carry such traits at a much higher level. The use of AI's will significantly protect you from problems; if you supplement with an AI, Gynecomastia and water retention can easily be controlled, and this will also help with blood pressure and cholesterol to a degree. Further, it is imperative you live a healthy lifestyle and consume a diet that is blood pressure and cholesterol friendly; if you can do these things, if you're a healthy adult male your Deca cycle will be met with success.
Another positive effect of deca-durabolin was reported by many bodybuilders who prior using this drug experienced pains in joints but once using it they started to enjoy training with no pain and that is attributed to deca’s ability to store more water in connective tissues.
However there are some moments which must be known by you before you start using nandrolone decanoate , it has a very strong effect on decreasing your sexual drive and it can cause gyno in some individuals. So have Nolvadex (tamoxifen citrate) on hand in case you feel gyno symptoms.