Continuous Glucose Monitoring in Nutrition Practice: Reviewing the Evidence for Medical and Preventive Application

Continuous glucose monitoring (CGM) was developed as a medical tool for people managing insulin-dependent diabetes, replacing the discomfort and data gaps of finger-prick testing with a continuous, real-time picture of interstitial glucose levels. What has shifted considerably over the past decade is the evidence base - and the conversation - around CGM use in people without diabetes. As rates of insulin resistance, pre-diabetes and metabolic syndrome continue to climb across the UK and globally, the question for nutrition practitioners is no longer whether CGM has a role beyond diabetes management, but how to use it preventatively, interpret it accurately, and deploy it responsibly where it genuinely adds clinical value. This short article examines that evidence, outlines a framework for data interpretation, and considers when CGM use may not be appropriate.