Longevity clinics promise you more years. Mostly, they sell you a subscription.

Follow the money

Strip away the marble and the model is three recurring revenue streams: annual memberships, repeat diagnostics, and products like supplements and IV drips. The memberships are steep. A review in the journal Aging catalogued annual programmes running from roughly $10,000 to $85,000, with some executive tiers above $100,000. On top of that sit regular biomarker panels, scans, biological-age tests and branded supplement cocktails you are nudged to keep buying.

To an operator, that is the dream: predictable, recurring income of the kind investors love. And it is riding a genuine wave. McKinsey puts the global wellness market near $2 trillion, over $500 billion in the US alone, with healthy ageing among its fastest-growing slices. Where demand runs that hot, products rush to meet it, evidence or not.

What the revenue isn't tied to

Notice what none of that income depends on: proven extra years of life. When MIT Technology Review reported a survey of 82 longevity clinics worldwide, more than a third offered stem-cell treatments despite no evidence they extend lifespan, and many prescribed ordinary approved drugs off-label for ageing, none of which has been shown to slow it.

Andrea Maier, who co-founded a longevity clinic and studies the field at the National University of Singapore, named the core problem plainly in her commentary on that survey: "Many clinics offer peptide and stem cell therapies without clear longevity-related indications." When the science is soft and the running costs are high, the pressure to add high-margin extras, more tests, more drips, more supplements, is built into the business.

The real medicine, and the theatre around it

Not all of it is snake oil, which is exactly what makes it persuasive. Genuine preventive care sits at the centre: blood-pressure control, standard cancer and metabolic screening, strength and cardio fitness, sleep and diet coaching. That part is worth attention. The trouble is the layer sold ahead of the evidence around it.

NAD+ and NMN infusions, resveratrol, plasma exchange, exotic peptide injections and IV cocktails are marketed as anti-ageing breakthroughs while the human data stays thin. Reviewing the popular supplements in The Conversation, scientists were asked whether NAD+, NMN and resveratrol are the elixir of youth; their answer was no. The structural catch is timing: ageing plays out over decades, but most supplement trials run weeks, so a compound can nudge a cellular marker without anyone showing it adds a single year to a human life. Biological-age scores, sold as one definitive number, rest on tests whose accuracy is still argued over. The best-supported longevity levers stay stubbornly cheap: exercise, sleep, a decent diet, not smoking, easy on the alcohol. None need a membership.

What this means for you

• If you're 35-49: You are the industry's prime new customer, sold prevention while you are still healthy. Separate the genuinely useful part, standard screening and honest lifestyle coaching, from the recurring supplements and infusions where the profit lives, and ask what actually changes based on each expensive test.

• If you're 50-64: The pitch gets more urgent as risks rise, and so do the upsells. Most of the screening on offer you can get through ordinary medicine, often covered by insurance. Before committing to a five-figure membership, ask your own doctor whether the extra scans and drips would change your care at all.

How to buy it like the subscription it is

A few questions cut through the mystique. Which of these tests would my regular doctor order anyway, and often have covered? What decision actually changes based on this scan or panel? How much of my monthly fee is proprietary supplements and drips? Is anyone steering me toward a recurring purchase framed as urgent?

A useful test changes what you do next; a profitable one just gets repeated. Watch, too, for the tell that a clinic describes itself as "wellness" rather than medical, which lets it market interventions that would struggle to clear a medical evidence bar. Take a biological-age readout as entertainment, not a diagnosis, and run any big-ticket recommendation past an independent doctor before you commit.

Our take

The longevity-clinic model is built for recurring revenue, not for delivering proven extra years, and the two are easy to confuse when the waiting room looks like medicine. The screening and coaching can genuinely be worth it. The proprietary supplements, the drips and the biological-age theatre are where the margin hides and the evidence runs out. Buy the prevention, skip the hope, and remember the cheapest longevity tools are the ones no clinic can put on a subscription.