Fine Chemicals

Chemical Name: 4-estren-17beta-ol-3-one decanoate
Synonyms: 19-nortestosterone 17-decanoate; 19-nortestoterone decanoate

World wide & quot;Deca& quot; is one of the most widely used anabolic steroids. Its popularity is due to the simple fact that it exhibits many very favorable properties.

Structurally nandrolone is very similar to testosterone, although it lacks a carbon atom at the 19th position (hence its other name 19-nortestosterone). The resulting structure is a steroid that exhibits much weaker androgenic properties than testosterone. Of primary interest is the fact that nandrolone will not break down to a more potent metabolite in androgen target tissues.

You may remember this is a significant problem with testosterone. Although nandrolone does undergo reduction via the same (5-alpha reductase) enzyme that produces DHT from testosterone, the result in this case is dihydronandrolone.

In earlier years, testosterone and nandrolone were the only pharmaceutical injectables that were both widely available to bodybuilders and economical. Estrogen control did not then exist. For this reason, Deca’s low aromatizing properties were then quite useful. Deca therefore won wide popularity.