Low testosterone and TRT: separating the symptoms from the marketing
Testosterone replacement therapy is oversold and underexplained. Here is how to tell if your symptoms are actually hormonal and what real care looks like.
Key points
- True low T requires two morning serum tests below ~300 ng/dL plus symptoms.
- Symptoms overlap heavily with poor sleep, overtraining, and depression.
- TRT works — but it suppresses fertility and requires ongoing monitoring.
- Lifestyle changes can raise testosterone meaningfully before any medication is needed.
Diagnosis is harder than the ads make it look
Testosterone is highest in the early morning, so a proper workup requires two separate morning draws (ideally before 10 a.m.), on different days, both showing total testosterone below roughly 300 ng/dL. A one-off afternoon test is not a diagnosis.
And numbers alone are not enough — the Endocrine Society guidance specifically requires consistent symptoms (low libido, ED, fatigue, loss of morning erections, mood changes) in addition to the labs.
Why TRT is not a starting point for most men
Sleep debt, chronic stress, under-eating, overtraining, and visceral fat all drive testosterone down. Fixing those can raise levels by 100-200 ng/dL in some men, without ever touching a prescription.
A good clinician will ask about all of that before writing a prescription — not because TRT is dangerous, but because missing a fixable cause means you are on hormone therapy forever for a reason that was not really hormonal.
When TRT is the right call
For men with genuine hypogonadism — hormonal labs confirmed, symptoms clear, lifestyle causes ruled out — TRT is effective and well-studied. It is also a commitment: your body will downregulate its own production, and stopping abruptly is unpleasant.
Expect ongoing labs (testosterone, estradiol, hematocrit, PSA) every 3-6 months, and a conversation about fertility before you start if that is on your horizon.