# Testosterone Phenylpropionate

*Also known as: Test PP*

Medium-chain ester (Sustanon component). Simple model — peak calibrated from sibling esters.

## Overview

Testosterone phenylpropionate is a short-to-medium-chain testosterone ester, best known as a component of blended ester preparations like Sustanon, and used on its own as a faster-clearing injectable. Once injected, tissue esterases slowly cleave the phenylpropionate ester to release free testosterone, with a release rate that sits between propionate and the longer cypionate-style esters. The compound has a roughly 60-hour half-life, about 69% bioavailability, and supports dosing two to three times per week to maintain stable serum levels. Effects are those of testosterone itself, including restored androgen status in replacement or supraphysiological anabolic effects in higher dosing, while the ester aromatizes fully to estradiol and contributes to the usual testosterone monitoring needs. Harm reduction centers on twice-weekly or more frequent dosing to smooth peaks, on the understanding that its pharmacokinetic model is calibrated from sibling esters rather than dedicated human data, and on standard testosterone bloodwork including trough testosterone, estradiol, hematocrit, and lipids.

## Pharmacokinetics

- **Model tier:** simple
- **Half-life:** 2.5 days (60 hours)
- **Cmax:** 94.1 ng/dL
- **Bioavailability:** 69%

## Dosing

- **Default dose:** 100 mg
- **Typical range:** 50–200 mg
- **Units:** ng/dL

## Harm reduction

- **Aromatizes:** Yes
- **DHT derivative:** No
- **Injection frequency:** 2–3×/week

## Source

- **Label:** PMC ester review
- **URL:** https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611952/
- **Notes:** Cmax calibrated to ng/dL serum peak.

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**Canonical URL:** https://anabolicdex.com/compounds/testosterone-phenylpropionate
**Plot:** https://anabolicdex.com/plot?compound=testosterone-phenylpropionate