What it is
Mechanism evidence: human
At a glance
What it is, why people use it, the evidence, and what to know before trying it.
Why people use it
- Glucose pattern and trend monitoring for indicated users.
- Feedback about meals, activity and treatment when interpreted in context.
Evidence at a glance
CGMs are established tools in diabetes care and selected OTC systems broaden access. For people without diabetes, data can be interesting but normal fluctuations are easy to over-interpret and proven outcome benefits remain limited.
Confidence: strong
Before measuring
Known limitations and precautions from reviewed sources.
Readings can be inaccurate or delayed, sensors can irritate skin, and some over-the-counter systems do not provide urgent low-glucose alerts. Symptoms and treatment decisions may require confirmatory testing and clinical guidance.