Nelson Vergel · 2011 · Modern / Men's Medicine

Testosterone: A Man's Guide

Know your numbers before you believe a marketing claim.

Hormonal health is measurable. Know your numbers, fix sleep, training, body fat and stress before chasing shortcuts.

What the book is

Vergel's practical guide to male hormonal health: what testosterone does, how it is measured, what actually lowers it, and how treatment works when it is genuinely indicated. It is a reference book, written against an industry built on selling men vague vitality.

The core discipline

Measure, then act. Total and free testosterone, SHBG, oestradiol, thyroid, sleep quality, body composition — symptoms alone mislead. Most men with low readings have reversible causes first: poor sleep, excess body fat, alcohol, chronic stress, no resistance training. Treatment is medical, lifelong once begun, and belongs with a physician.

How it lands on a modern man

Fatigue, low drive and low mood are real signals and deserve real testing, not a supplement bought from a podcast advert. Get bloodwork, fix the free levers first, and if therapy is warranted, do it under supervision with follow-up labs. Refusing to know your numbers is not stoicism, it is avoidance.

The marrow

  • Test before you treat; symptoms alone are unreliable.
  • Sleep, body fat, alcohol and training move hormones before drugs do.
  • TRT is a medical decision with long-term consequences, including fertility.
  • Most over-the-counter boosters are marketing.

Video reference

Watch a reading of Testosterone: A Man's GuideOpens a YouTube search: “testosterone bloodwork men's health explained doctor”