The Studies · fact-check
Should healthy people wear a CGM? What OTC clearance actually changed
A continuous glucose monitor lets healthy people optimize metabolism, personalize food, and prevent future disease.
OTC clearance made CGMs easier to buy; it did not prove that healthy people need a monthly glucose feed. Useful as a two-week audit for prediabetes or a specific diet question, weak as an open-ended subscription for the worried well.
What changed
On March 5, 2024, the FDA cleared Dexcom Stelo as the first over-the-counter continuous glucose monitor in the US. The device is for adults 18+ who do not use insulin, including people with type 2 diabetes on oral medication and people without diabetes who want to see how diet and exercise affect glucose.
That is a real access change. It means a buyer can get a legitimate sensor without a prescription. It does not mean glucose tracking became a proven longevity intervention for metabolically healthy people.
What the subscription skips
A CGM is not a bloodless watch metric. It uses a sensor under the skin, measures interstitial glucose, and can carry ordinary device costs: skin irritation, local infection, discomfort and data that a healthy person may not know how to act on.
For people without diabetes, the strong use case is short and specific: learn which meals spike you, test whether a post-meal walk helps, then stop. The weak use case is paying every month to flatten normal glucose variation while ignoring the boring ledger: body weight, blood pressure, ApoB, training and sleep.
The watch claim is separate
The FDA warning on glucose watches and rings is blunt: no smartwatch or smart ring has been authorized, cleared or approved to measure or estimate blood glucose values on its own. A watch can display data from an authorized CGM; it is not the glucose monitor.
If medical decisions depend on the number, use an FDA-authorized device and a clinician. If curiosity is the goal, buy a two-sensor experiment, write down the meals, and exit before the subscription becomes the habit.
What we read
See the scored Trackers & diagnostics guide →
By David Persson · Updated 2026-06-12 · Corrections: hi@agewell.guide