Nelson Vergel

Nelson Vergel

Founder, Excel Male Forum
Author: Books

Why Use hCG With TRT?- A Clinical Review

Jul 02

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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...

Blood Tests Erectile Dysfunction Fertility HCG Health & Wellness How to Guides Men's Health Sperm count Testosterone Testosterone side effects TRT TRT blood tests

The Evolution of Testosterone Products in the U.S. (1935-2025)

Jun 27

Thanks to Dr Sun for this diagram. Timeline details (left → right) YearProduct (image above/below the line)Form & delivery 1935-1937No product image—text block below the line: “Testosterone first synthesized” with a bullet list of early...

Men's Health Testosterone TRT TRT blood tests TRT Doctors

Testosterone Replacement Therapy (TRT) Facts Every Man Should Know

Jun 23

Testosterone Replacement Therapy (TRT) can be life-changing for many men suffering with low testosterone symptoms. However, there are crucial facts that most men are not told by their physicians before they start TRT. Here are the top facts that...

Health & Wellness Hormones Men's Health Testicular Atrophy Testosterone Testosterone side effects TRT Videos

Smoking Cessation's Effects on Male Hormonal Levels

Jun 22

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...

Blood Tests Erectile Dysfunction Health & Wellness Men's Health Testosterone Testosterone side effects TRT Weight Loss

Elevated Hematocrit from Testosterone Therapy vs High-Altitude Adaptation: A Comparative Analysis

Jun 22

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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...

Blood Tests Heart Health High Hematocrit Men's Health Testosterone side effects TRT blood tests

Medications that Can Impair Muscle Mass and Strength Gains from Resistance Training

Jun 18

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Introduction Many common medications – both prescription and over-the-counter – can influence the muscle mass and strength gains achievable through resistance exercise. Some drugs impair or blunt muscle hypertrophy and strength development, while...

Anabolic Agents Men's Health Muscle Gain Supplements

Erection Supplements- Do They Work to Improve ED?

Jun 18

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Briefing: Erection Supplements and Erectile Dysfunction (ED) This briefing reviews information from the "Erection Supplements- Do They Work to Improve ED?" discussion on the Excel Male TRT Forum, focusing on the efficacy, safety, and regulatory...

Erectile Dysfunction Men's Health Sex drive Supplements

WARNING: Do not believe Internet "gurus" proclaiming no need to manage hematocrit on TRT

Jun 17

Debunking the Myth About High Hematocrit in Men on TRT I know many of you want to feel reassured that managing hematocrit isn’t necessary. However, misinformation is spreading, with some "bro science" videos and even a few so-called expert...

Blood Tests Health & Wellness Heart Health High Hematocrit Men's Health Testosterone side effects

Best HCG Dose for Men on TRT: Two Studies That Used HCG with Testosterone

Jun 15

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Note:HCG mimics LH but it is not LH and it's not picked up by the LH blood test. In fact, it suppresses LH like endogeneous testosterone does. But the amazing thing that the study below found is that HCG can increase sperm production and quality...

Erectile Dysfunction Fertility HCG Hormones Men's Health Sex drive Sperm count Testicular Atrophy Testosterone Testosterone side effects TRT

HCG Reconstitution Calculator- HCG Dosage Calculator

Jun 13

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Even though it is a simple calculation, some men struggle calculating IU and cc doses of HCG. Here is a simple site to help. SCROLL DOWN TO THE BOTTOM OF THE PAGE FOR A SIMPLE CALCULATOR Before we start, why is hCG measured in IU's instead of...

HCG

High Estradiol in Men on TRT: What to Do

Jun 11

Briefing Document: Estradiol in Men on TRT Source: Excerpts from "High Estradiol in Men on TRT: What to Do" by Nelson Viegel (excelmale.com) 1. The Role and Importance of Estradiol in Men Core Idea: Estradiol, often misconstrued as a solely...

Blood Tests Erectile Dysfunction Estradiol estrogen in men Men's Health Testosterone side effects TRT blood tests

Eating More Live Microbes May Boost Testosterone: What a New Study Found

Jun 04

A new study published in Scientific Reports (Nature Publishing Group) has found a potential link between eating foods rich in live microbes—like those found in yogurt, kefir, kimchi, and other fermented foods—and higher testosterone levels in...

Men's Health Nutrition Testosterone

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