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Comparison of the Effects of High Dose Testosterone and 19-Nortestosterone to aReplacement Dose of Testosterone on Strength and Body Composition in Normal Men

机译:高剂量睾酮和19-去甲睾酮对睾酮替代剂量对正常男性力量和身体成分影响的比较

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Two androgen esters with very different anabolic/androgenic indices, testosteroneenanthate (TE) and 19-nortestosterone decanoate (ND) are frequently used in clinical practice and these two rank highest in popularity with athletes using parenteral preparations. TE and ND have similar halftimes to elimination of about 1 week, however, their metabolism to other biologically active compounds is different and this could be expected to modify their physiological activity. The 5 alpha-reduction of 19-nortestorone markedly reduces androgen receptor binding affinity which would imply a reduced action of tissues where intracellular 5-alpha reduction is important for the biological effect, such as in the accessory sex organs.

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