Test prop time til peak

Roughly 12 hour
13-Figure14.4-1.png
 
That work by Nieschlag doesn't exclude a much earlier peak. In addition, I believe that was using 50 mg, a relatively large dose. There are reasons to believe that the apparent half-life of an ester is dose dependent, being shorter with lower doses. I've mentioned that my measurements with doses <10 mg have been consistent with peaking in under five hours—but the isolated samples are not definitive.
 

Sure about that champ?

Those one-liners though!



My reply from a previous thread:

Regarding half-lives keep in mind that a majority of studies on the PK/PD of the various T-esters were done using IM (once weekly/fortnightly) injections in a small number of subjects and most of the literature is from decades ago.

There are many other factors that affect the rate at which the testosterone is released from the oily depot at the injection site.

Sub-q vs IM, the volume of injection, injection depth, site of injection, lymphatic flow, the concentration of BOH (benzyl alcohol) are other possible factors that can affect absorption rates of the esterified hormone.
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

Beyond Testosterone Podcast

Online statistics

Members online
3
Guests online
345
Total visitors
348

Latest posts

Back
Top