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    35% Drop in serum Total T in 6 months with no protocol change. Why???

    Hi everyone, During the past 6 months I've experienced a 35% drop in Total Testosterone levels, while keeping the same protocol. Has anyone experienced anything similar? What could be the cause for this decline? My Protocol: 60mg Testosterone Enanthate SubQ E3.5D 700IU HcG SubQ E3.5D 0.25mg...
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    Spreadsheet for Calculating Free T & E2

    There's been a lot discussion recently in Excelmale on wanting to test for Free E2 and the relatively high cost of this test. There are online calculators which calculate an estimate of Free T based on Total T, SHBG and Albumin. However there doesn't appear to be an online calculator for...
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    Optimal TRT Strategy for low SHBG guys; SSRI effects; HCG vs. T injections effect on polycythemia

    Hi everyone, I've been reading here for a little over a year and I've found this site most educational. Thank you to Nelson for all the informative material on this website (I also enjoyed your book which I bought on Amazon) and for everyone else here who contributes information and shares...
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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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