Skip to content
Browse compounds

Trenbolone Acetate

19-nor ester, injectable. Half-life 36 hours.

Also called Tren A, Tren Ace, Finaplix

36 hours
Half-life
87%
Active fraction
Injectable
Route
7.5 days
Approaches steady state

Serum concentration from a single dose

Modelled serum concentration curve for a single 100 mg dose of Trenbolone Acetate

single 100 mg dose over 7.5 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 36 hour half-life and a very light ester, leaving about 87% active compound per mg. Daily or every-other-day administration is what keeps the curve from oscillating. It anchors the calibration for the trenbolone 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

The half-life is read from a published reference. No peak concentration has been published, so the height of the curve is calibrated rather than cited. Read it on ScienceDirect.

Common questions about Trenbolone Acetate

What is the half-life of Trenbolone Acetate?

The model uses a terminal half-life of 36 hours for Trenbolone Acetate. 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 Trenbolone Acetate take to reach steady state?

Roughly 7.5 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 36 hours that puts Trenbolone Acetate at 7.5 days of climbing before the curve flattens.

How long does Trenbolone Acetate stay in your system?

About 8.3 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 Trenbolone Acetate on a timeline with the rest of your cycle and watch the curves add up.

Open the calculator