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I would guess that the half life is gonna be a lot shorter than that with it being in Mct Oil. Something to look into.
I’m not so sure about that (maybe I’m not a brewer). I’m not very experienced on the matter, but here is my point of view:

An ester is a fatty chain of amino acids. Your body cleaves off a little at a time. I think most of us are familiar with Enanthate and Cypionate. Cypionate has just one more carbon molecule, that is why it’s half-life is slightly longer than Enanthate. Dec is longer than cyp and undec has a longer chain than Dec.

I’m not sure how much the carrier oil affects the half-life, but certain oils do dilute certain esters a little better than others. MCT’s big appeal at the moment is shelf life.
 
I’m not so sure about that (maybe I’m not a brewer). I’m not very experienced on the matter, but here is my point of view:

An ester is a fatty chain of amino acids. Your body cleaves off a little at a time. I think most of us are familiar with Enanthate and Cypionate. Cypionate has just one more carbon molecule, that is why it’s half-life is slightly longer than Enanthate.

I’m not sure how much the carrier oil affects the half-life, but certain oils do dilute certain esters a little better than others. MCT’s big appeal at the moment is shelf life.
20.9 day half life in tea oil, vs 33.9 day half life in Castor. MCT would likely be a bit less than tea oil, so I'd say a very significant difference. Here's the study;




Intramuscular injection of testosterone undecanoate for the treatment of male hypogonadism: phase I studies.

Behre HM1, Abshagen K, Oettel M, Hübler D, Nieschlag E.
Author information


Abstract

OBJECTIVE:

In the search for long-acting testosterone preparations suited for substitution therapy of hypogonadal men, testosterone undecanoate (TU) dissolved in either tea seed oil or castor oil was investigated.
DESIGN:

In study I, 1000 mg TU in tea seed oil (125 mg/ml) were injected in equal parts into the gluteal muscles of seven hypogonadal men. In study II, 1000 mg TU in castor oil (250 mg/ml) were injected into one gluteal muscle of 14 patients.
RESULTS:

In comparison with published data on testosterone enanthate, most widely used for i.m. injections, the kinetic profiles of both TU preparations showed extended half-lives and serum levels not exceeding the upper limit of normal. The castor oil preparation had a longer half-life than TU in tea seed oil (33.9+/-4.9 vs 20.9+/-6.0 days (mean pm S.E.M.)).
CONCLUSION:

The longer half-life and the smaller injection volume make TU in castor oil a strong candidate for further applications in substitution therapy and in trials for male contraception.


Abstract
In the search for long-acting testosterone preparations suited for substitution therapy of hypogonadal men, testosterone undecanoate (TU) dissolved in either tea seed oil or castor oil was investigated.In study I, 1000 mg TU in tea seed oil (125 mg/ml) were injected in equal parts into the gluteal muscles of seven hypogonadal men. In study II, 1000 mg TU in castor oil (250 mg/ml) were injected into one gluteal muscle of 14 patients.In comparison with published data on testosterone enanthate, most widely used for i.m. injections, the kinetic profiles of both TU preparations showed extended half-lives and serum levels not exceeding the upper limit of normal. The castor oil preparation had a longer half-life than TU in tea seed oil (33.9+/-4.9 vs 20.9+/-6.0 days (mean pm S.E.M.)).The longer half-life and the smaller injection volume make TU in castor oil a strong candidate for further applications in substitution therapy and in trials for male contraception.
 
I would guess that the half life is gonna be a lot shorter than that with it being in Mct Oil. Something to look into.
Good call Ackmack! I am wrong.
20.9 day half life in tea oil, vs 33.9 day half life in Castor. MCT would likely be a bit less than tea oil, so I'd say a very significant difference. Here's the study;


Thank you for the reference material AllGoodThings! I’m lacking in this area and have some reading to do. I clearly have a misunderstanding of carrier oil and ester combinations.
 
Good call Ackmack! I am wrong.

Thank you for the reference material AllGoodThings! I’m lacking in this area and have some reading to do. I clearly have a misunderstanding of carrier oil and ester combinations.
I'm lacking in this area of knowledge too, amongst many others, I just happened to have looked into it thanks to another vendors thread where it came up a while back.
 
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