State-of-the-Art Lecture: Updates on testosterone replacement therapy CUA 2025

madman

Super Moderator
Nelson's house.....you know where it's at!








Conclusions
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TRT & Prostate Cancer
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post #5/6 (Go nuts)!
 
TRT & Cardiovascular Disease
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TRAVERSE Summary
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FDA Label Change
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Novel TRT Options
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TRT Timeline
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Canadian Market
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For all the GPs, endocrinologists, urologists and T-clinics it needs to be stressed to your patients that in Canada we use/rely upon the linear law-of-mass action Vermeulen (cFTV) for testing free testosterone as it replaced the known to be inaccurate direct immunoassays yet many are still not aware that the cFTV tends to overestimate free testosterone!














Unfortunately we do not have easy access to the most accurate assay for testing free testosterone the gold standard Equilibrium Dialysis and even then as of now there is no standardized ED assay let alone harmonized reference range for free testosterone.

The CDC has been working hard behind the scenes over the years on developing a standardized FT assay (ED-LC/MS/MS) and harmonized reference range for free testosterone.

Similar to what was done for harmonized TT.

* Assays that are standardized are designed to provide accurate results, traceable to “true” value-assigned certified reference materials and gold-standard reference methods.

Soon enough we will have a CDC Hormone Standardization Program (CDC HoSt) Certified Free Testosterone Procedure and a harmonized reference range for free testosterone!

Just a matter of time as this has been a painstaking wait!

We need this!














 

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

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