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What continues to bother me about this study is that the apparent half-lives are so long, seven and 10 days respectively for IM and SC. Is this due to the lack of benzyl alcohol in the XYOSTED product? It's noted that benzyl alcohol improves the absorption rate of a nandrolone ester, so presumably the same applies to testosterone esters. On the other hand, the benzyl alcohol content is pretty low in the standard formulations. The research below also notes that the absorption-enhancing effects of benzyl alcohol are strongest early on, because the alcohol depletes faster than the ester.

The absorption of nandrolone is enhanced by the presence of benzyl alcohol. This is most likely an effect of altered oil viscosity and partition coefficient between the oil and aqueous phase.

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It appeared that the absorption of nandrolone is enhanced by the presence of benzyl alcohol in the first few days. Subse- quently, upon BOH depletion, a change in absorption of nandrolone is seen.

[URL unfurl="true"]https://www.sciencedirect.com/science/article/abs/pii/S0928098715300853[/URL]