By Nelson Vergel | ExcelMale.com | Updated December 2025 When evaluating testosterone levels, most men focus exclusively on total testosterone—a single number that tells only part of the story. What many don't realize is that a protein called...
Are you tired of painful intramuscular injections and wondering if there's a more comfortable way to administer your testosterone replacement therapy? For decades, intramuscular (IM) injections have been the standard method for testosterone...
By Nelson Vergel | ExcelMale.com | Updated December 2025 Introduction Should you take an aromatase inhibitor with testosterone replacement therapy? This question has sparked considerable debate in men's health circles, with some clinics routinely...
By Nelson Vergel | ExcelMale.com | Updated December 2025 Summary: This comprehensive guide examines the development of FDA-approved oral testosterone products—Jatenzo, Tlando, and Kyzatrex—which overcome the liver toxicity problems of earlier...
Many men begin testosterone replacement therapy expecting their sexual function to improve across the board—better libido, stronger erections, enhanced satisfaction. And while TRT often delivers significant benefits for desire and overall sexual...
Summary: The TRAVERSE trial, a landmark FDA-mandated study involving over 5,200 men, has definitively concluded that testosterone replacement therapy (TRT) does not increase the risk of major cardiovascular events like heart attacks, strokes, or...
Clascoterone 5% Topical Solution for Male Androgenetic Alopecia Overview Clascoterone 5% topical solution represents what could be the first genuinely novel therapeutic mechanism for male pattern hair loss in over three decades. Cosmo...
Testosterone is a controlled substance in the US, specifically a Schedule-III controlled substance (in all but one State), and this includes any form of testosterone including injectable, transdermal, patches, pellets, and any compound or product...
FDA Approval of Testosterone Therapy for Women: An Analysis of Historical Failures, Regulatory Hurdles, and a Path Forward Executive Summary The landscape of testosterone therapy presents a stark gender disparity: while over 31 FDA-approved...
I collected questions and answers posted on ExcelMale.com in the last 10 years about the use of human chorionic gonadotropin in men who want to prevent loss of testicular size and fertility while on testosterone replacement therapy or that want...
@Nelson Vergel We need you here! https://www.fda.gov/patients/fda-expert-panels/fda-expert-panel-testosterone-replacement-therapy-men-12102025 Location: FDA White Oak Campus, 10903 New Hampshire Ave., Building 31, Great Room, Silver...
What's the best HCG dosing protocol for men on TRT? Whether you're using HCG to maintain fertility, prevent testicular atrophy, or preserve intratesticular testosterone, the dosing frequency matters. Should you inject daily, every other day, or...
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.
