People assume there’s a dramatic moment when someone “decides” to go on testosterone.
There wasn’t.
There was no epiphany.
No panic.
No sudden obsession with numbers.
There was simply a point where not acting became the greater risk.
The numbers mattered — but not in the way people think
By the time testosterone became a serious consideration, I already had multiple data points.
My first test:
7.8 nmol/L
Technically “normal”.
Functionally disastrous.
My next test:
13.64 nmol/L
Again — “normal”.
And here’s where the misunderstanding begins.
Because most people — including many clinicians — treat testosterone as a binary:
below range → act
inside range → stop thinking
But endocrinology doesn’t work that way.
The range problem no one explains
Reference ranges are population-based, not outcome-based.
They answer one question only:
“Is this person acutely hypogonadal by disease criteria?”
They do not answer:
Is this sufficient for this individual?
Is this level supporting recovery?
Is this level compatible with chronic stress and responsibility?
Is this level usable by the body?
In clinical practice (historically and practically), testosterone interpretation has often fallen into informal bands:
Below ~8 nmol/L → clearly low
8–12 nmol/L → borderline, symptoms critical
Above ~12 nmol/L → labelled “normal”, investigation often stops
But here’s the truth that lives outside rigid systems:
Very few men function well in the low teens under real-world pressure.
Why 13–14 nmol/L can still be insufficient
Testosterone is not a standalone metric.
Total testosterone is only one variable in a system that includes:
SHBG (how much testosterone is bound and unusable)
Free testosterone (what actually reaches tissues)
Cortisol and chronic stress
Sleep quality
Nervous system regulation
Inflammation
Androgen receptor sensitivity
A man at 13.6 nmol/L with:
high stress
poor sleep
nervous system overload
high responsibility
can be functionally hypogonadal, even if the lab says otherwise.
That’s not optimisation talk.
That’s basic physiology.
The false comparison trap: “But he’s at 18”
Around this time, I spoke to other men who told me their levels were in the high teens — 18 nmol/L or thereabouts.
On paper, that looks “not far off”.
In reality, the difference between:
13 → 18
can be the difference between:barely coping
and having margin
Hormonal effects are non-linear, especially near the lower end.
Small numerical differences can produce large functional changes — particularly in:
mood stability
confidence
stress tolerance
recovery
sense of self
This is why one man at 18 can feel “fine”, while another at 13 is quietly collapsing.
Functional vs optimal (without ideology)
I wasn’t chasing an “optimal” number.
I was trying to stop losing ground.
In practice, many clinicians — quietly — recognise:
~15–18 nmol/L as a functional minimum for many men
~18–25 nmol/L as a range where many feel resilient and stable
That doesn’t mean everyone needs the same level.
It means context matters.
And my context was clear:
chronic stress
declining capacity
failed stabilisation
worsening symptoms
no remaining lifestyle levers to pull
When stabilisation fails, numbers become signals — not goals
By this point:
sleep had been addressed
training adjusted
nutrition stabilised
substances reduced
stress acknowledged
time allowed
And still, the system could not generate:
drive
regulation
confidence
recovery
The numbers didn’t cause the decision.
They confirmed that something fundamental was missing.
The real decision
The decision point wasn’t:
“Do I want testosterone?”
It was:
“Do I accept further deterioration, or do I intervene responsibly?”
Waiting longer didn’t feel cautious anymore.
It felt negligent.
Not acting was no longer neutral.
It was actively harmful.
Why this distinction matters
This wasn’t optimisation culture.
This wasn’t vanity.
This wasn’t impatience.
It was a measured response to:
persistent symptoms
failed first-line strategies
and a system that had no next step
The numbers were part of the picture.
They were never the whole picture.
The line I stand by
I didn’t choose testosterone to become more.
I chose it to stop unnecessary loss —
after everything else that should have worked… didn’t.
That’s the decision point.
DAVID