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  1. A

    Phone app to compute free T (Vermeulen, Mazer, Södergård) and immunoassay calibration

    Dear Excelmale members, Recently, I've been working with the help of a friend (actually he did most of the work) on an Android software that helps in the computation of free T (contains Vermeulen, Mazer, Södergård, ...) and that generates reports that link the values obtained to the current...
  2. Z

    Testosterone dose and blood level calculator

    Does anyone have the link to the calculator that you would input your dose and it would plot the daily release and build up over the course of the week/weeks. Basically presented you with that sawtooth patten graph.
  3. G

    Calculated Free Testosterone?

    Here are my last two endocrine lab reports. A dozen years ago they did direct tests of my Free Testosterone. Now they only do a calculated equation. I did bring this up with my doctor a couple years ago, but he seemed to feel this is a perfectly fine way to measure Free T. As you can see, there...
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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

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