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Nandrolone at its most efficient

Chemical athletes who want to use nandrolone to build up their muscle mass are best off choosing a preparation with a) the longest ester possible, b) the highest concentration possible and c) injecting it in their gluteus muscle instead of in their shoulders. This according to a 1997 study published by andrologists at the University of Sydney in the Journal of Pharmacology and Experimental Therapeutics.

Nandrolone at its most efficient

Nandrolone at its most efficient
The researchers did an experiment with 23 healthy, non-obese men aged between 18 and 40. They divided the men up into 4 groups and injected each group with a different nandrolone preparation. All preparations contained 100 mg nandrolone.

Then the researchers measured the amount of nandrolone in the men's blood each day for the next 32 days.

Injection sites
The first group were given an injection of 100 mg nandrolone phenylpropionate [structural formula shown above] in their buttock. Nandrolone phenyl propionate used to be an ingredient in Organon's Durabolin, and is now found in UG preparations. Phenylpropionate is an ester that does not remain in the blood as long as decanoate. The 100 mg was in an ampoule of 4ml groundnut oil.

The second group got the same kind of injection, but containing nandrolone decanoate, the steroid in Deca-Durabolin.

The third group also got an injection containing 100 mg nandrolone decanoate in the buttocks, but this time the nandrolone was concentrated in 1 ml groundnut oil.

And finally, the fourth group were injected with 100 mg nandrolone decanoate, dissolved in 1 ml groundnut oil, in the shoulder muscle.

Nandrolone at its most efficient

Nandrolone phenylpropionate gives a rapid peak in the blood, but the peak subsides after 4-5 days. Nandrolone decanoate doesn't cause a peak, but remains present for much longer in the blood.

More nandrolone enters the blood if you inject it in a more concentrated form: 1 ml instead of 4 ml.

Injecting into the buttocks results in more nandrolone in the blood than injecting into the shoulders.

In the table below the shaded part shows the total amount of nandrolone that shows up in the blood after four separate injections. Look at the 'area under the curve'.

Nandrolone at its most efficient

The research was partly financed by Organon Australia.

J Pharmacol Exp Ther. 1997 Apr; 281 (1): 93-102.