Optimal free testosterone level

masonstorm1

New Member
Hi everyone - i've used 2 different labs for my TRT levels and get 2 drastically different levels for my free T. Does anyone know what is a good range for optimal free T? I've heard that total T can have a huge range but the free T is most important. Thanks.
 
Labcorp had me at 18 w/ a total T of 1400 and my doc's test had me at 151 free T and 1200 total T. Going to assume Labcorp is the better indicator?
 
Hi everyone - i've used 2 different labs for my TRT levels and get 2 drastically different levels for my free T. Does anyone know what is a good range for optimal free T? I've heard that total T can have a huge range but the free T is most important. Thanks.


There is no set optimal for FT let alone TT as every individual is different.

Most men do well having a FT level in the 30 ng/dL range.....some run higher levels and others lower.

Regarding lab work best piece of advice is to stick to using the same lab and the same testing method and regarding free testosterone you need to have it tested using the most accurate method such as the gold standard Equilibrium Dialysis or Ultrafiltration to truly know where your FT level sits.

You can also use the newer calculated TruT method which will provide you with the most accurate estimate of FT if you choose to use such method.
 

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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