Thoughts on free T lab results

Pringle

Active Member
Looking for some thoughts on my latest labs. I switched to ED dosing 12mg T Cyp in September from 50mg E3.5D. My labs in November were 900 T with 32 Free T. This was up from 28 Free T in August. Got my latest T numbers back today and my total T was 862 and Free T was 38. My E2 and SHBG values were in same range mid 30’s each both labs. Not sure what to make of my increasing Free T #’s over last 6mos. Maybe just an inaccurate lab? My next consult with Defy is about 6 weeks from now.
 
Results from the standard directly-measured free T tests tend to jump around too much to be useful. Just as bad, different labs can have normal ranges that are not remotely comparable. Much better is to use SHBG and total T in a free T calculator.
 

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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

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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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