Andy13
AF Member
posted 05-11-2002 04:49 PM
You are correct in that a testosterone ester, injected IM, is stored and released slowly. Can we all agree that when an AAS in injected IM, it slowly is released into the blood where it is de-esterified to an active androgen? Ok--
And since you are a mechanical engineer, you should recognize the fact that the rate of diffusion of the AAS from the site of injection is exponentially related to the size of the depot. And as the size of the depot decreases, so does the rate of diffusion from the site of injection.
The equation for amount of esterified testosterone remaining after x (day, hours) is k*e^(ln(1/2)*x/h), where k= amount injected, x=day/hour you are interested in and h=half life (x and h units must be consistant).
If you are interested in the derivation of this equation, check out your Diff equ book.
The amount of ACTIVE or, released testosterone over one day/hour is simply the difference between two x values.
But, besides all the math stuff.. This one's actually pretty logical.. Testosterone is released the FASTEST from the site of injection when the size of the injection is largest.. And, when the size of the injection is largest is..... Immediately after the injection! Does this make any sence? Sustanon's esters DO NOT release one by one.. They ALL release at the same time, albeit some slower than others. The prop esters rate of release is faster then the deconate ester.. But, regardless, the PEAK blood testosterone from any single injection of sustanon is seen about 24hrs after it is injected. I've done this math/graphs ad naseum. I've also seen actual blood test graphs-- the theoretical graphs (from the equation I gave) is remarkably similar to the the actual blood tests.. So much that we may plot these mathematical graphs and assume they are, for our purposes, accurate.
Contrary to belief, the graph of a single shot of sustanon does not look like a pyrymid, suggesting that the PEAK blood levels are seen some 3-4-5-6 days after the initial injection.
Actually, the graph looks much like a ski sloap.. It has a SHARP up spike and then gradually sloaps down from there..
Do the math- you will see. I wish I could figure out how to plot these graphs on this board.
Andy