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Long vs Short Esters

Zillagraybeard

Zillagraybeard

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This research evaluates the effects of short vs. long esters of testosterone on peak plasma levels, suppression, and aromatization.
For 28 weeks, this research compares test enanthate, test undecanoate, and test bucilate at equal dosages of pure test (20mg/kg of test, adjusted for esters' weight).
They discovered a few facts that most users are aware of: the longer the active life (in this example, bucilate, then undecanoate, then enanthate), the greater the suppression of LH, the higher the estradiol levels, the worse it affected HDL/LDL, and the greater the anabolic effect.

Despite the prolonged release and relatively uniform levels of androgens, longer acting esters appear to have a higher degree of aromatization (ie no peaks and valleys).
This is thought to impact suppression of LH/FSH, implying a significant link between aromatization and suppression. This is also seen in dianabol.

Another article I read suggested that DHT conversion may possibly be related to ester length. If a molecule aromatizes strongly, it should convert to DHT to a lesser extent.
Shorter esters appear to have a higher conversion to DHT than longer esters, which has been reported anecdotally, and typically induce less suppression than longer esters, regardless of dose.
Prior study demonstrated this. Takeaway: it appears that longer esters have effects other than just prolonging a compound's half life: they alter suppression and estrogen conversion, which should be considered when constructing protocols.
 
H

heavyhitter

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jesus. The black font on black background makes this basically impossible to read
 

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