The Testosterone Problem Nobody in the Industry Wants to Discuss

Testosterone replacement is genuinely valuable medicine for men who need it. The difficulty is the business model that has grown around it, in which a clinic's revenue depends on the answer to the question it is also being asked to decide.

What a proper diagnosis requires

Testosterone follows a circadian rhythm, peaking in the early morning and falling through the day. A level drawn at four in the afternoon can be forty percent below the same man's eight-o'clock value. Diagnosing deficiency from an afternoon draw is not conservative or aggressive; it is simply not a diagnosis.

• Two separate total testosterone measurements, both drawn before 10am
• Free testosterone and SHBG, since binding protein changes alter the meaningful number
• LH and FSH, to establish whether the problem is testicular or pituitary
• Prolactin, because an elevated result can indicate a pituitary adenoma
• Hematocrit, PSA and a metabolic panel as a safety baseline

That workup occasionally finds something that matters more than the testosterone level itself. We have identified pituitary lesions, untreated thyroid disease and new diabetes in men who came in asking about energy and libido.

What replacement will and will not do

In a genuinely deficient man, testosterone reliably improves libido, and usually improves energy, mood, muscle mass and bone density. Its direct effect on the mechanics of erection is more modest — it often works by making PDE5 inhibitors effective in men who previously did not respond.

In a man with normal testosterone, replacement will not improve his erections. He will have accepted suppressed fertility, a rising hematocrit and indefinite monitoring in exchange for nothing.

The fertility conversation

Exogenous testosterone suppresses the pituitary signals that drive sperm production. This can persist for many months after stopping and, in some men, does not fully recover. If there is any possibility you may want children, this conversation must happen before the first prescription — and alternatives such as clomiphene or hCG-based protocols exist precisely for that situation.

If a clinic prescribes testosterone at your first visit without a second morning draw and without asking about children, you have learned something important about that clinic.

What about the heart?

This was an open question for years. The TRAVERSE trial, published in 2023, randomized more than 5,000 men with hypogonadism and cardiovascular risk and found no increase in major adverse cardiac events with replacement. That is genuinely reassuring. It is not a reason to prescribe testosterone to men who do not need it.