Whatstack

Guide

Testosterone.

How to test it, what drives it low, the natural levers that work, TRT and its real doses, fertility — and the supplements that don’t deliver.

Contents

  1. 01Understanding testosteroneTestosterone isn't simply a 'male hormone' — it's the output of a feedback loop, and it…
  2. 02Total, free & SHBG'Low testosterone' is really three numbers, not one. Knowing which one matters is what…
  3. 03Symptoms & who this is forThe number only means something alongside symptoms. Treatment is for men who have both…
  4. 04Getting tested properlyA large share of 'low testosterone' diagnoses fall apart on a correct retest. The rules for…
  5. 05What's driving it lowLow testosterone is a symptom, not a diagnosis in itself. Finding the cause changes…
  6. 06Body fat: the biggest leverFor most men with low-ish testosterone and some extra weight, losing fat is the single…
  7. 07SleepTestosterone is made largely during sleep, so short or fragmented nights drag it down…
  8. 08Training & the muscle mythResistance training is excellent for your body and your health. But the popular belief that…
  9. 09Stress, alcohol & the brakesThe rest of the natural levers are about removing brakes — the everyday things quietly…
  10. 10MicronutrientsThe honest rule for supplements runs through this whole part: they help if you're genuinely…
  11. 11Herbs & adaptogensThis is where the biohacker market lives. A couple of herbs have real if modest evidence…
  12. 12Diet & the honest supplement verdictDiet composition matters a little for testosterone; body fat matters a lot. And the honest…
  13. 13TRT: formulations & dosesWhen lifestyle isn't enough and the deficiency is real and symptomatic, testosterone…
  14. 14TRT: what to expect & who benefitsReplacement genuinely works for genuine deficiency — but the benefits are specific, the…
  15. 15TRT: monitoring & safetyTRT is safe when it's properly monitored and risky when it isn't. The monitoring schedule…
  16. 16Fertility & keeping your own productionThis is the most under-counselled fact in men's health, and it deserves its own section…
  17. 17The functional & biohacker lensA large 'optimisation' world sits alongside mainstream care — some of it genuinely useful…
  18. 18Build your protocolEverything here reduces to a sequence: get an honest diagnosis, fix the reversible causes…
  19. 19Sources & how to read the evidenceThis guide was built from the primary literature — clinical guidelines, randomised trials…
Educational reference — not medical advice. This summarises published research and clinical guidance. Doses are typical figures from the literature, not instructions. Get properly tested and never start, stop, or self-source hormones on your own — decide anything here with a qualified clinician.