Online TRT Clinics: How to Tell a Good One From a Bad One

The advert finds you on a Tuesday evening. Tired? Low drive? Losing your edge? Take our two-minute assessment.

You answer twelve questions. A finger-prick kit arrives. You post it back, and a week later a message says your testosterone is low and a prescription is ready. Total elapsed time from advert to medication: about ten days. You have not spoken to anyone for longer than four minutes.

Some of these clinics are excellent, and for men who cannot get their GP to take the question seriously, they are a genuine route to treatment. Others are selling a subscription.

The difference is visible before you pay, if you know what to look at.

Why this matters now

Hormone therapy prescriptions have risen roughly 86 per cent since 2021, with testosterone driving most of that increase in men. Telehealth platforms are advertising directly to consumers on a scale that did not exist five years ago.

The regulatory ground has shifted underneath that. The FDA removed the cardiovascular warning from testosterone labels in early 2025 after the TRAVERSE trial, and in December 2025 an expert panel supported widening eligibility. In April 2026 the agency began exploring an expanded indication for low libido.

Then in June 2026, research presented at ENDO looked at what actually happens in practice, and the number is worth sitting with.

Reviewing 200 men who had been diagnosed with hypogonadism and prescribed testosterone, researchers found that only 12 per cent had received a guideline-concordant evaluation: two morning testosterone measurements below the threshold, LH or FSH measured, and no contraindications.

Twelve per cent. And this was in a large academic health system, not a direct-to-consumer app.

The Endocrine Society responded in July 2026 with a statement reiterating that treatment should not be based on symptoms alone.

The finding that should stop you

Buried in the same study is a number that reframes the entire question.

Fifty-five per cent of the men prescribed testosterone had obstructive sleep apnoea. Sixty-three per cent were obese. Forty per cent had depression. Twenty-eight per cent had diabetes.

These are not incidental details. Sleep apnoea, obesity and depression all lower testosterone, and all three are treatable in ways that raise it without a prescription. More than half of these men had a condition that plausibly caused their low reading, and they were given a hormone instead.

That is what inadequate assessment produces: a real symptom, a real low number, and the wrong treatment for the actual problem. What causes low testosterone covers the list that should be worked through first, and sleep apnoea and testosterone covers the most commonly missed one.

What a proper assessment includes

Use this as your checklist. A clinic that does all of it is taking you seriously. A clinic that skips most of it is processing you.

Two separate morning blood tests. Testosterone varies substantially through the day and between days. One reading, particularly an afternoon one, cannot establish a diagnosis. Both samples should be before eleven in the morning, on different days.

LH and FSH. These separate primary from secondary hypogonadism, and that distinction changes the whole treatment path. If your problem is the signal from the brain rather than the testes, some causes are reversible and some alternatives to testosterone exist. A clinic not measuring these cannot know which situation you are in.

SHBG and free testosterone. A normal total with high SHBG can leave very little available hormone. Missing this cuts both ways: it misses men who need treatment and treats men who do not. Normal blood test, still low testosterone covers it.

Prolactin. Rules out a pituitary tumour, which is uncommon but treatable with tablets rather than hormones.

Full blood count and haematocrit. The baseline for the side effect most likely to require dose changes.

PSA in men over forty, before starting.

Screening for the reversible causes. Sleep apnoea, thyroid function, iron studies, HbA1c, a medication review and an honest conversation about alcohol.

A real conversation with a prescriber who asks about your symptoms, your history and your plans for children. TRT and fertility covers why that last question matters more than most men realise.

Warning signs

Six things that should give you pause, roughly in order of seriousness.

A prescription after one blood test. The clearest signal, and the most common.

No LH or FSH. Diagnosis without direction.

A finger-prick test as the sole basis for diagnosis. Fine for screening; venous sampling is more reliable for confirming testosterone.

Nobody asks about sleep, weight, alcohol or medication. Given that over half of prescribed men have sleep apnoea, a clinic that does not ask about snoring is not looking.

The consultation is a form. A questionnaire is not an assessment. Validated symptom questionnaires exist, and the urology guidelines are explicit that they should not replace proper evaluation.

Monitoring is optional or extra. If follow-up bloods cost more, or are not scheduled at all, the clinic has ended its interest at the point of sale.

Questions worth asking before you pay

Any decent clinic will answer these without hesitation.

"Will you test twice, and at what time of day?"

"Do you measure LH, FSH, SHBG and prolactin as standard?"

"What would make you decline to prescribe?" This is the most revealing question on the list. A clinic that has never declined anyone is not a clinic.

"What is the monitoring schedule, and is it included?"

"Who is the prescriber, and can I speak to them?"

"If I want to stop, what does that involve?" Coming off matters, particularly for fertility, and the answer tells you whether they have thought past your first payment.

What good looks like

Not every online service is a problem, and the good ones share features.

They test twice, venous, in the morning. They run the full panel rather than testosterone alone. They ask about sleep, weight, alcohol and medications, and they say so if something else needs addressing first. They decline men who do not meet criteria. Monitoring is scheduled and included. There is a named prescriber you can actually reach.

Some will tell you to fix your sleep and lose weight before they will prescribe. That is not them being difficult. The Endocrine Society's 2026 statement says exactly that: for men whose hypogonadism is attributable to being overweight, with no other identified cause, weight loss is first-line treatment. Why your belly fat will not budge covers that loop.

If you are already with one

Not a reason to panic, and a reason to check three things.

Look at what was actually tested. Request your results. If you never had LH, FSH or SHBG measured, you do not know what kind of hypogonadism you have.

Check your monitoring. Haematocrit, PSA and testosterone levels should be checked in the first six months and periodically after. TRT side effects covers what should be watched and why haematocrit matters most.

Ask whether anything reversible was missed. If you snore heavily, carry significant weight, drink more than you would admit, or take opioids, those things are still there, and treating them may reduce or remove your need for the prescription.

None of this means stopping. It means knowing whether the treatment matches the problem. TRT versus natural optimisation covers that wider decision.

The honest summary

Online clinics have made testosterone accessible to men whose GPs dismissed them, and that is a genuine good. Access was a real problem.

But the ENDO 2026 data shows that even in a large academic system, only twelve per cent of prescriptions followed the diagnostic standard. There is no reason to think a platform advertising a ten-day turnaround does better.

The gap between a clinic that treats you and one that sells to you is not subtle. It is two blood tests instead of one, LH and FSH instead of testosterone alone, and a question about your snoring.

Ask what they test. The answer tells you almost everything.

Common questions

Are online TRT clinics legitimate?

Many are, and they have improved access for men whose GPs dismissed their symptoms. The variation in standards is wide, and the difference shows in what they test before prescribing.

How many blood tests should I have before a prescription?

Two, both taken before eleven in the morning on separate days. A single test cannot establish the diagnosis because levels vary substantially through the day and between days.

What tests should be done besides testosterone?

LH and FSH at minimum, plus SHBG, free testosterone, prolactin, full blood count and PSA if over forty. Thyroid, iron and HbA1c are worth including.

Is a finger-prick test good enough?

For screening, yes. For confirming a diagnosis that leads to lifelong treatment, venous sampling is more reliable.

Why do so many prescriptions not follow the guidelines?

Research presented at ENDO 2026 found only 12 per cent of men had a fully guideline-concordant evaluation. Testosterone is increasingly used for common non-specific symptoms, and prescribing without proper assessment exposes men to risk without benefit.

Should I stop if my clinic did not test properly?

Not on your own. Request your results, see what was measured, and raise the gaps. If reversible causes were never looked for, they are still there and worth addressing.

Sources: Sinha S, Papaleontiou M et al., Guideline-concordant diagnostic evaluation prior to testosterone prescribing, presented at ENDO 2026, Endocrine Society Annual Meeting, June 2026 · Endocrine Society, Statement on Testosterone Replacement Therapy, 16 July 2026 · Bhasin S et al., Testosterone therapy in men with hypogonadism: an Endocrine Society clinical practice guideline, J Clin Endocrinol Metab 2018;103(5):1715-44 · American Urological Association, Testosterone Deficiency Guideline · US Food and Drug Administration, FDA takes step forward on testosterone therapy for men, April 2026 · Educational only, not medical advice. Never stop a prescribed medicine without speaking to your prescriber.

Keep reading: What causes low testosterone · Blood test: what to check · Normal blood test, still low testosterone · Sleep apnoea and testosterone · TRT side effects · TRT versus natural optimisation