Prediabetes

Blood sugar higher than normal but not yet in the diabetes range. It's a warning sign and can often be reversed.

MetabolicLast updated: 21 October 2026

Quick Summary

Primary Symptoms

Usually no symptoms. Found with a blood test.

Common Treatments

Healthy eating, regular activity and weight loss; sometimes metformin.

Risk Factors

Being overweight, inactivity, family history, age, South Asian background and gestational diabetes.

OverviewSymptomsCausesTreatmentFAQ

Overview

Prediabetes means the body is starting to struggle to control blood sugar. Without changes, many people go on to develop type 2 diabetes.

Lifestyle changes can bring blood sugar back to normal and greatly lower the risk of diabetes.

Symptoms

No symptoms

Most people feel well.

Possible signs

Some people have darkened skin in the neck or armpits.

Found on testing

Fasting sugar or HbA1c slightly above normal.

Higher heart risk

Prediabetes also increases heart disease risk.

Causes & Risk Factors

Biological Causes

Insulin resistance and reduced insulin production, linked to weight, genes and inactivity.

Key Risk Factors

  • Weight Especially around the waist.
  • Family history Of type 2 diabetes.
  • Low activity Sitting for long periods.

Management & Treatment

01. Lifestyle

Regular activity, fewer refined carbohydrates and sugary drinks, more fibre.

02. Weight loss

Losing 5–7% of body weight can help.

03. Regular testing

Check blood sugar at least once a year.

Frequently Asked Questions

Can prediabetes be reversed?
Often yes, with lifestyle changes.
How is it diagnosed?
With fasting blood sugar, HbA1c or a glucose tolerance test.
Do I need medicine?
Sometimes; your doctor will advise.

Sources and further reading

Last updated 21 October 2026. For more detail, see these trusted health organisations.