Continuous glucose monitors (CGMs) use a small sensor worn on the arm to track glucose through the day. In 2024 the FDA cleared the first over-the-counter CGMs for adults who do not use insulin, aimed at people curious about how food, exercise and sleep affect their glucose. They are not for diagnosing diabetes or adjusting medication; people with diabetes should use devices and plans from their care team.
OTC CGMs bring glucose tracking to people without a prescription.
How they work
| Part | What it does |
|---|---|
| Sensor | Measures glucose in fluid under the skin |
| App | Shows trends, meals and activity |
| Lag | Readings trail blood glucose by several minutes |
Who they are cleared for
Adults not using insulin. They are not designed for people at risk of dangerous low glucose or for medication decisions.
Getting useful insight
- Log meals, exercise and sleep.
- Look at patterns over days.
- Discuss questions with your doctor or a dietitian.
Privacy
Check how the app stores and shares data; see sharing data with your doctor.
Browse home monitors or read cleared vs wellness features.
Common questions
Does a CGM hurt?
Applying the sensor involves a quick applicator with a thin filament under the skin. Most people find it mildly uncomfortable at most.
How long does a sensor last?
Over-the-counter sensors typically last around one to two weeks, depending on the product.
Can a CGM tell me if I have diabetes?
No. Diagnosis requires tests ordered by a healthcare provider.