Blood Tests

Dr. Shalender Bhasin: Optimizing the Diagnosis and Treatment of Hypogonadism 2025
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Nelson's house u heard it here first! Dr. Shalender Bhasin! * over the past 4 decades he has become a global leader in the biology of androgens, sarcopenia and aging related functional decline, his research has shaped clinical guidelines, its...
Low Testosterone in Men: Recommendations on the diagnosis, treatment and monitoring
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ABSTRACT The relative proportional increase of the elderly population within many countries will become one of the most significant social transformations of the twenty-first century and, for the first time in history, persons aged 65 or above...
TRT, Peptides & Fertility: A Deep Dive With Dr. Larry Lipshultz
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Step into the origins of modern men’s health and testosterone therapy with Dr. Alex Tatem as he sits down with his mentor, Dr. Larry Lipshultz — the pioneer behind male fertility surgery, testosterone research, and advanced hormone therapy. In...
Testosterone Therapy and Erythrocytosis - the most common dose-limiting effect of testosterone therapy
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https://www.thebloodproject.com/cases-archive/testosterone-therapy-and-erythrocytosis-2/ Introduction Androgens play a crucial role in the development and maintenance of: Male reproductive and sexual functions Body composition...

Testosterone, Semen Analysis, and Male Fertility: Expert Advice with Real-Life Journeys on Fertility

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Clomid is old news! hCG + FSH is where it's at for restoring/maintaining fertility on or off exogenous T! 500IU 3x/week will restore normal ITT. Protocol is compounded purified preparations of hCG/FSH (3000 IU hCG + 75 IU of FSH) injected...
Sex Hormone-Binding Globulin (SHBG): Biology and Biomarker
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Nelson's house! We get deep here! Dr. Winters! Sex Hormone-Binding Globulin: Biology and Clinical Biomarker Applications Presented by Dr. Steve Winters, Emeritus Professor, Division of Endocrinology and Metabolism Endocrinology Grand...
The Recent Advances on SHBG Regulation by Nutritional Factors
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Sex hormone-binding globulin (SHBG) is a homodimeric glycoprotein produced by the human liver and secreted into the systemic circulation where it binds with high affinity sex steroids regulating their availability in blood and accessibility to...
Why Men’s Fertility Is Declining: The Truth About Testosterone
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In an insightful interview from the "Dr. Gabrielle Lyon" YouTube channel, Dr. Larry Lipshultz, a renowned expert in male reproductive health, discusses the alarming global decline in male fertility, attributing it to factors such as obesity...
Unmasking Risks: Prevalence of Erythrocytosis Among Men on T-Therapy Across Different Formulations
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* The study population included men with (i) early morning total testosterone (TT) using LCMS, (ii) free T (FT) measured using equilibrium dialysis, and (iii) who were started on TTH. * Men using intramuscular or topical testosterone face a...
Natural Thyroid Medicine Under Threat by the FDA: DTE And Your Options
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The FDA just made a decision that could strip away affordable thyroid treatment for thousands of Americans - without public input, without proper science, and based on a petition from a drug company that wants a monopoly. This affects YOU if...
Rusfertide Decreases Need for Therapeutic Phlebotomy in Polycythemia Vera
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New Treatment Could End the Phlebotomy Cycle for Men with High Hematocrit If you're a man on testosterone replacement therapy (TRT) who's been told you need regular blood draws to manage your hematocrit levels, a breakthrough treatment currently...
How to Prevent and Reverse Erectile Dysfunction
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How to Prevent and Reverse Erectile Dysfunction: Your Complete Guide to Getting Hard and Staying Strong Bottom Line Up Front: You don't have to accept erectile dysfunction as your new reality. Whether you're dealing with occasional difficulties...
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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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