The Problem with “Normal”

The standard testosterone reference range on most lab reports spans roughly 9–30 nmol/L (260–1000 ng/dL in the US system). If your result lands anywhere in that band, you’re told you’re fine. Send home.

That range was built on population averages — which includes sedentary, obese, metabolically compromised men in their 70s. “Normal” in that context means average for a population that is, largely, not well.

Optimal is a different number entirely. And the number on the page is only half the picture.

Reference Range vs. Optimal Range

Reference ranges and optimal ranges are built from two completely different philosophies. A clinical reference range is designed to flag values that are far enough outside a population band to suggest disease risk, significant dysfunction, further investigation, or medical intervention. That matters. It can keep people alive. But it is not the same as asking whether a man is thriving.

Optimal ranges ask a higher-resolution question: are you recovering, building muscle, thinking clearly, sleeping deeply, feeling libido, holding emotional stability, and showing up as the strongest version of yourself? We move from “are you sick enough to treat?” to “is your biology actually supporting the life you are trying to live?”

And this is why I never read labs in isolation. Labs are a snapshot in time. Sleep, food, alcohol, supplements, training load, illness, stress, timing, and even the assay itself can move the result. Symptoms and life quality scores are not soft data. They are your body reporting what is happening internally over weeks and months. A lab marker tells me one frame. Your symptoms tell me the movie.

The Markers That Actually Matter

Total Testosterone vs. Free Testosterone

Total testosterone is the number most men see. It measures everything in the blood — including testosterone that’s bound to proteins and biologically unavailable. What your tissue actually uses is free testosterone.

A man can have a “normal” total T of 18 nmol/L with SHBG (sex hormone binding globulin) so elevated that free testosterone sits at 180 pmol/L — well below functional range. He will feel every symptom of low testosterone. His lab report will read “normal.”

Always look at free T. Always check SHBG.

SHBG — The Testosterone Trap

SHBG binds to testosterone and makes it unavailable. Elevated SHBG is driven by chronic cortisol, excess oestrogen, liver stress, thyroid dysfunction, low insulin, and elevated growth hormone binding proteins.

Functional range for SHBG in men: approximately 20–40 nmol/L. Above that, you’re losing available testosterone regardless of what your total reads.

Oestradiol — The Conversion Problem

Testosterone aromatises into oestradiol (E2) through the aromatase enzyme. That conversion happens in fat tissue, the liver, and the brain. At functional levels, oestradiol is essential — for bone density, libido, mood, and cardiovascular health. Too much, and the cascade breaks down.

Symptoms of elevated oestradiol in men: poor body composition despite training, emotional volatility, reduced libido, brain fog, water retention, low motivation. Sound familiar?

Target range: approximately 80–120 pmol/L (22–33 pg/mL). Many men with gut dysfunction, obesity, liver stress, or genetic upregulation of aromatase run this chronically elevated. Their testosterone also then drops — because the feedback loop reads oestrogen as a signal to reduce LH and therefore testosterone production.

Where Testosterone Actually Comes From

Before the brain can signal testosterone production, the body still needs the raw material. Testosterone is a steroid hormone. Steroid hormones are built from cholesterol. Cholesterol is not automatically the enemy. It is a biological building block your body uses to make steroid hormones, maintain cell membranes, produce bile acids for fat digestion, support vitamin D production, and build the architecture of the nervous system.

The medical system often speaks about cholesterol like it only exists to clog arteries. That is the wrong level of thinking. High-risk lipid patterns matter. Cardiovascular risk matters. But if a man starts treating cholesterol itself like poison, he forgets that his body cannot make testosterone out of thin air. You need the signal, the enzymes, the micronutrients, the mitochondria, the liver support, the stress regulation, and the raw material.

The Hormone Cascade You’re Not Being Told About

Testosterone doesn’t exist in isolation. It’s downstream of a production chain that starts in the brain (the hypothalamus) with GnRH, triggers the pituitary to release LH and FSH, which signal the testes to produce testosterone. Disruption at any point in that chain shows up as “low T” at the end — even when the symptom is really upstream, so anything that disrupts your brain like stress or poor sleep will directly mess up your testosterone.

Chronic stress → elevated cortisol → HPA axis suppresses HPG axis → LH drops → testosterone production drops. This is called HPA-HPG cross-talk. It’s not low T as a primary condition. It’s low T as a downstream consequence of chronic activation of the stress response.

You don’t fix that with TRT. You fix it by addressing the actual driver.

What I Saw in My Own Bloodwork

When I was competitively bodybuilding, I was on TRT at a moderate dose — still higher than what most men would naturally produce. My total testosterone looked great on paper. Above optimal. Exactly the kind of number most men would celebrate.

But the results did not match the number. I was using more testosterone than my body would naturally produce, yet I was not progressing the way I had before I started. It made no sense until I ran a comprehensive hormone panel. My SHBG had climbed so high that my free testosterone was lower than when I had less total testosterone in my body.

That was the first time I truly understood the trap. More total testosterone does not automatically mean more usable testosterone. After applying the correct nutrition strategy, lifestyle anchors, liver support, stress regulation, and targeted supplementation, my free testosterone tripled in less than three weeks without my total testosterone meaningfully changing. Same total. Completely different biological access.

Later, after bodybuilding, my focus changed. I was thinking long-term. I wanted lasting health, but I did not want to give up feeling strong, powerful, athletic, and fit. I was lucky enough to meet Eternal Wellness Center at the right moment. They guided me through coming off TRT without feeling or looking like I had fallen off a cliff.

The challenge was obvious on bloodwork: my total testosterone was dropping fast because the signalling was not there yet. TRT had suppressed the brain-to-testes conversation. My free testosterone stayed technically in range, but toward the lower end, supported by nutrition, supplementation, and lifestyle anchors. Then the peptide strategy was inserted to help restore the part of the biology that was broken: signalling.

As signalling came back online, total testosterone climbed again and free testosterone rose with it. With peptide therapy, guidance from Eternal Wellness Center, and obsessive work on nutrition, sleep, training, stress, gut, and liver support, I rebuilt the system to a level I would once have called impossible. My free testosterone came back close to 90% of my bodybuilding days, and now sits in the top one percent of the optimal range — sometimes even climbing above it.

That is the lesson. The number is not the whole story. The system is the story. SHBG, free T, oestradiol, LH, FSH, liver function, gut inflammation, stress load, sleep, nutrition, and signalling all decide whether testosterone actually becomes a lived experience: drive, recovery, libido, muscle, mood, confidence, and power.

The Practical Markers to Request

• Total Testosterone (nmol/L or ng/dL)
• Free Testosterone (calculated or direct)
• SHBG (sex hormone binding globulin)
• Oestradiol (E2) — sensitive assay, not the standard panel
• LH and FSH (pituitary signals — tells you if the problem is primary or secondary)
• Prolactin (if low libido or ejaculatory issues present)
• DHT (if hair loss, prostate concerns, or aggressive conversion symptoms)
• Cortisol (ideally 4-point salivary or minimum AM serum)
• DHEA-S (adrenal precursor to testosterone)
• Thyroid panel: TSH, Free T3, Free T4, Reverse T3, thyroid antibodies

This is a functional panel. Your GP may not run all of it. Private labs like Medichecks (UK), Marek Diagnostics, or direct-to-consumer options in your country will. The PrimalScan will help you identify which of these matter most based on your symptom picture.

What to Do With This Information

First: don’t panic at a number. Context is everything. A total T of 16 nmol/L with free T in a healthy range, low SHBG, and good E2 balance may function better than a man with total T of 24 and SHBG of 72.

Second: identify the upstream driver. Is this stress-mediated? Gut-mediated? Liver dysfunction elevating SHBG? Thyroid-mediated? Nutritional deficiency (zinc and magnesium are rate-limiting for testosterone synthesis)? Each driver has a different intervention pathway.

Third: if you’ve optimised the foundations — sleep, stress, gut, liver, micronutrients, training stimulus — and the numbers remain suboptimal, this is where clinical support becomes relevant.

The Bottom Line

Your testosterone lab results are one data point. A poorly interpreted one, in most clinical contexts. The full picture requires free T, SHBG, oestradiol, LH, FSH, thyroid, and cortisol at minimum — interpreted against functional ranges, not population averages — with the upstream drivers clearly identified before any intervention is designed.

This is biology, not weakness. And it has a root cause. Always.