Blood Tests

How U.S. Blood Banks Handle Therapeutic Phlebotomy for Men on Testosterone Replacement Therapy (TRT)
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How U.S. Blood Banks Handle Therapeutic Phlebotomy for Men on Testosterone Replacement Therapy (TRT) Blood centers have had to adapt their policies because the polycythemia/erythrocytosis that often accompanies TRT creates both medical need...
Testosterone Replacement Clinical Guide from ExcelMale.com
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ExcelMale.com Quick Guide: DIAGNOSIS OF HYPOGONADISM: Symptoms and signs suggestive of testosterone deficiency in men: A. More specific symptoms and signs • Incomplete or delayed sexual development, eunuchoidism • Reduced sexual desire...
U-Shaped Association Between Testosterone and Fractures
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The occurence of fractures in an elderly population is a significant concern, so this study looked at the relation between the number of fractures and hormone levels, including testosterone. It found fractures were higher at both low and high...
New Zealand does not let me give blood to decrease high hematocrit on TRT
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Hi Guys Blood lab turned me away for having Haemoglobin of 198. Apparently the limit is 185(Here in New Zealand) I am currently on 80mg(split twice a week 40+40)of test cyp deep IM. Have been on this for 4 months and going well. Can't do and...
Iron Supplementation Protocol to Raise Ferritin FAST While on TRT: The Vorck Protocol
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Hi all, I started TRT in 2001 and have been giving blood over the years and have always had issues with recovering my ferritin. Long story short, I got tired of waiting for others to do the research, so I did it myself, created a protocol, hired...
Comparison of U.S. Clinical Guidelines on Hormone Replacement Therapy (HRT) in Women
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These are not usually what many US clinics follow, but I wanted to show what the guidelines say. Comparison of U.S. Clinical Guidelines on Hormone Replacement Therapy (HRT) in Women Multiple U.S. medical organizations—including The Menopause...
Testosterone/Estradiol Ratio: The Hidden Key to Low Libido in Men with Sexual Dysfunction?
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Poster 149: Testosterone/Estradiol Ratio and Low Libido in Men with Sexual Dysfunction Title TESTOSTERONE: ESTRADIOL RATIO A STEP FORWARD TOWARDS THE UNDERSTANDING OF LOW LIBIDO IN MEN WITH SEXUAL DYSFUNCTION Authors Rodrigo Freddi, Rubens...
Estrogen-It's what makes a real man
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Study: Low estrogen can cause problems for men Study: Low estrogen can cause problems for men (2013) Dr. Joel Finkelstein, an endocrinologist at Harvard Medical School and the lead author of a new study, talks about the effects of declining...
Metabolic benefits afforded by estradiol and testosterone in both sexes
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As we very well know T s metabolites estradiol and DHT are needed in order to reap full beneficial effects of testosterone. Ts metabolites estradiol and DHT are needed in healthy amounts to experience the full spectrum of testosterones...
Why Use hCG With TRT?- A Clinical Review
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Using hCG in Men on Testosterone Replacement Therapy (TRT) – A Clinical Review Introduction Exogenous testosterone replacement therapy (TRT) can profoundly suppress the hypothalamic-pituitary-gonadal (HPG) axis through negative feedback. By...
Smoking Cessation's Effects on Male Hormonal Levels
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This scientific paper investigates the effects of smoking cessation on hormonal levels in men, specifically focusing on steroid hormones like testosterone, DHEA, DHEAS, cortisol, and sex hormone-binding globulin (SHBG). The researchers aimed to...
Elevated Hematocrit from Testosterone Therapy vs High-Altitude Adaptation: A Comparative Analysis
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From this thread: WARNING: Do not believe Internet "gurus" proclaiming no need to manage hematocrit on TRT - Excel Male TRT Forum Underlying Physiological Mechanisms Testosterone Replacement Therapy (TRT) and Erythrocytosis: Exogenous...
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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