Blood Tests

Unmasking Risks: Prevalence of Erythrocytosis Among Men on T-Therapy Across Different Formulations

Sep 17

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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...

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Natural Thyroid Medicine Under Threat by the FDA: DTE And Your Options

Sep 16

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...

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Rusfertide Decreases Need for Therapeutic Phlebotomy in Polycythemia Vera

Sep 06

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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...

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How to Prevent and Reverse Erectile Dysfunction

Sep 03

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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Factors Involved in Sex Drive and Erection Quality: Beyond Testosterone

Aug 31

The Complex Neurochemistry of Male Sexual Function: Understanding the Biological Foundations of Desire and Performance Male sexual function represents one of the most intricate orchestrations of neurochemical, hormonal, and physiological...

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Thyroid Tests and What They Mean

Aug 26

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Thyroid Blood Tests and What They Mean Your thyroid gland is a small, butterfly-shaped gland in your neck that plays a big role in controlling your energy, metabolism, and overall health. When the thyroid is not working properly, you may develop...

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Learn Quickly About Testosterone Deficiency and Its Treatments

Aug 14

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I hope you enjoy this part 1. Yes, it is almost 2 hours long but I concentrated everything I know so that you do not have to read for hours. What is low testosterone (hypogonadism) and how is it diagnosed? Low testosterone, or hypogonadism...

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Testosterone Therapy in Pre- and Post-Menopausal Women: Deep Dive

Aug 08

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Testosterone Therapy in Pre- and Post-Menopausal Women Testosterone Therapy for Women: Indications and Evidence (2010–2025) Low Sexual Desire (HSDD) and Sexual Function Evidence: Multiple randomized controlled studies (RCTs) and meta-analyses...

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Testosterone clinics - Do they know what they are doing?

Jul 31

* They discuss how these clinics often bypass proper lab testing, ignore fertility risks, and prioritize quick prescriptions over patient safety—all under the buzzword of “optimization.” Testosterone therapy is trending—but are clinics...

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427-Page Illustrated Book: Beyond Testosterone

Jul 28

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I am very pleased to announce that I finally finished my full color 427-page booK: Nelson Vergel's "Beyond Testosterone: The Illustrated Guide" and the associated free online resource at Excelmale.com serve as comprehensive guides to...

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Prostate Cancer - Active Surveillance: Past, Present, and Future

Jul 25

* the truisms are that most men die with rather than of prostate cancer, if you live long enough almost all men will get a couple of cancer cells in the prostate Dr. Matthew Cooperberg takes us on a candid journey through Active...

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How to Lower High Hematocrit Caused by Testosterone Replacement Therapy (TRT)

Jul 23

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High Hematocrit Caused by Testosterone Replacement Therapy By Nelson Vergel, B.S.Ch.E., M.B.A. High hematocrit occurs when there is an excessive production of red blood cells. High hematocrit can cause the blood to become very viscous or...

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TRT Hormone Predictor Widget

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