The Zone Between Two Draws
A symptomatic 52-year-old whose two morning testosterone levels land on opposite sides of the usual 300 ng/dL line — and a debate over whether the diagnosis is even settled yet.
Marcus T. has coached varsity track for eleven years and still runs the warm-up laps with his athletes most mornings, which is part of why the fatigue caught his attention before anything else did — he has spent the past eight months arriving at practice already tired, watching his own 5K pace slide by nearly a minute, and noticing his interest in almost everything, including his marriage, has gone quietly flat. His annual district employment physical, required for coaching certification, is what actually got him into the office rather than symptoms alone; he had assumed the fatigue was just turning fifty-two.
His physician ordered two morning fasting testosterone levels a week apart, the standard confirmatory approach, and the two results didn't agree with each other the way a clean diagnosis would: 287 ng/dL on the first draw, 305 ng/dL on the second, averaging almost exactly on the 300 ng/dL line most guidelines use to separate normal from low. LH and FSH came back within the normal range on the same draws, which doesn't resolve whether this is a real, if mild, primary testicular problem or simply noise around a number that was never far from normal to begin with. His BMI is 31, and that fact matters directly here — adipose tissue lowers sex hormone-binding globulin, which lowers total testosterone on the lab report without necessarily lowering the free, biologically active hormone his tissues actually see, so his total T could be reading artificially low without him being truly deficient at all.
TRAVERSE, the trial behind the 2025 removal of testosterone's cardiovascular boxed warning, enrolled men who had two separate morning testosterone levels reliably below 300 ng/dL alongside hypogonadal symptoms. Marcus's own two draws don't clearly satisfy that description — one sits under the line, one sits over it — which means the safety reassurance that trial offers doesn't automatically transfer to him the way it would to a man whose numbers were unambiguous. Whether he is even a candidate for that reassurance, before any conversation about starting treatment, is itself still an open question his own labs haven't answered.
In clinic, reading two numbers that disagree
Eight months of this is a long time to keep telling a man his labs need one more look. His symptoms are real and functionally limiting — he's slower at his own job, and he's noticed his marriage going flat, which is not a subtle complaint. I'd rather treat the person in front of me than chase a third confirmatory draw indefinitely on the theory that his first two weren't quite clean enough.
I take the point that 300 is a somewhat arbitrary line, which is exactly my argument for not treating it as sacred in either direction.
The eight months of symptoms isn't in dispute. What's in dispute is whether we've actually confirmed the diagnosis those symptoms are being attributed to. His two draws don't agree with each other, and TRAVERSE's own safety data was built on men who were reliably under 300 on two separate mornings — his own numbers straddle that line rather than sitting clearly beneath it. Extending TRAVERSE's reassurance to a man whose labs don't actually match its entry criteria is a bigger extrapolation than it sounds like when it's stated in one sentence.
A third standardized morning draw, done fasting with no recent illness or sleep deprivation, costs him two weeks. Starting empirically because the wait feels unsatisfying isn't the same as the diagnosis being confirmed.
There's a version of this that doesn't require picking a side on the two draws at all. His BMI is 31, and adiposity lowers sex hormone-binding globulin independent of true testicular function, which drags total testosterone down on the report without necessarily reflecting what his tissues actually see. A free testosterone and SHBG, drawn alongside the repeat total, would tell us whether his borderline number is a real hormonal problem or a body-composition artifact riding on top of a testosterone that was never truly low.
If the free testosterone comes back low too, that's a genuinely different, more confirmatory picture than the total alone gives us, and it settles this without anyone having simply outvoted anyone else on how to read one ambiguous line.
Agreed: repeat fasting AM testosterone with a concurrent free testosterone and SHBG, standardized for time of day and fasting state, before any treatment decision. Marcus left the visit with lab orders, not a prescription, and with an explanation of why the two draws he already had weren't being treated as either dismissible or diagnostic.
Not agreed: how much weight his eight months of symptoms should carry if the repeat total testosterone lands back in the ambiguous zone a third time. The primary care physician remains ready to treat symptomatically at that point; the endocrinologist wants the free testosterone result to be the deciding factor regardless of how the total reads again. Neither treated the other's position as wrong, and the actual decision was deferred to results neither of them has yet.