Glycaemic Index: How Foods Affect Blood Glucose

The glycaemic index (GI) compares how quickly carbohydrate-containing foods raise blood glucose. It does not determine whether a food is healthy on its own.

Symptoms, causes and key details

Portion size, total carbohydrates, fibre, protein and fat also affect the glucose response. Fruit, whole grains and pulses should not be judged solely by a GI number.

Assessment and practical next steps

Combine vegetables, protein and fibre in meals and limit sugary drinks. If you have diabetes, discuss individual targets and a practical plan with a dietitian.

When is urgent help needed?

Meal changes can affect hypoglycaemia risk in people using insulin or glucose-lowering medicines; discuss major changes with your care team.

Frequently asked question

Can low-GI foods be eaten without limits?

No, portions and overall nutritional quality still matter.

This article provides general information, not a personal diagnosis or treatment.

Trusted information source: https://www.diabetes.org.uk/guide-to-diabetes/enjoy-food/carbohydrates-and-diabetes/glycaemic-index-and-diabetes