Masteron Propionate
DHT derivative, injectable. Half-life 2 days.
Also called Mast P, Drostanolone propionate
Serum concentration from a single dose
single 100 mg dose over 10 days, vertical lines mark each half-life elapsed since the peak
Estimated. No study reports a peak concentration for this compound, so the shape is inferred from the half-life and the level is calibrated against related compounds rather than measured. The height is the least reliable part of this curve.
What the numbers mean
A 2 day half-life that behaves on a plot much like testosterone propionate, which is why the two are often placed on the same injection days. The light ester leaves about 84% active drostanolone, and it anchors the calibration for the masteron family.
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 Masteron Propionate. Its figures are carried over from the compound database this plotter was built against, and should be treated as the weakest in the set.
Same base compound
Common questions about Masteron Propionate
What is the half-life of Masteron Propionate?
The model uses a terminal half-life of 2 days for Masteron Propionate. 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 Masteron Propionate take to reach steady state?
Roughly 10 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 2 days that puts Masteron Propionate at 10 days of climbing before the curve flattens.
How long does Masteron Propionate stay in your system?
About 11 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 Masteron Propionate on a timeline with the rest of your cycle and watch the curves add up.
Open the calculator