Testosterone Suspension
Unesterified testosterone, injectable. Half-life 33 hours.
Also called Test Susp, Test base
Serum concentration from a single dose
single 100 mg dose over 6.9 days, vertical lines mark each half-life elapsed since the peak
What the numbers mean
No ester at all, so the full 100% of the mass is active. The 33 hour half-life comes from a study in horses and is the least reliable figure in the testosterone family; the calibration fits its level to the other esters rather than trusting it outright.
The active fraction is the share of each milligram the model treats as reaching circulation as active compound. For an injectable that is ester weight: a milligram of enanthate is not a milligram of testosterone. For an oral it is bioavailability, the share that survives the gut and the liver, which is why some orals sit far below 100%. How the model works.
Where these numbers come from
No published reference is recorded for Testosterone Suspension. Its figures are carried over from the compound database this plotter was built against, and should be treated as the weakest in the set.
The reference figures come from a study in horses. The height of this curve has been fitted to the other testosterone esters rather than taken from that study directly.
Common questions about Testosterone Suspension
What is the half-life of Testosterone Suspension?
The model uses a terminal half-life of 33 hours for Testosterone Suspension. For an injectable that figure is the rate the oil depot releases the compound rather than the rate the body clears it, which is why it runs longer than the half-life of the ester itself.
How long does Testosterone Suspension take to reach steady state?
Roughly 6.9 days, on a schedule that does not change. Steady state is conventionally taken as five half-lives, the point at which each dose is clearing about as fast as the next one arrives, and at a half-life of 33 hours that puts Testosterone Suspension at 6.9 days of climbing before the curve flattens.
How long does Testosterone Suspension stay in your system?
About 7.6 days after the last dose for the serum level to fall to a few percent of where it was, on the same five-and-a-half half-life reasoning. That is the modelled blood level only. It is not a detection window: metabolites are found by testing long after the parent compound has gone, and this model says nothing about that.
Put Testosterone Suspension on a timeline with the rest of your cycle and watch the curves add up.
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