Abnormal glucose tolerance can usually be restored to normal through lifestyle intervention, and if it is ineffective, then treatment with metformin can restore normalcy in some patients. Abnormal glucose tolerance refers to an abnormality in the body’s regulation of blood glucose, which is judged by the criterion of blood glucose greater than or equal to 7.8mmol/L but less than 11.1mmol/L two hours after the glucose tolerance test. There are three types of regression of abnormal glucose tolerance, i.e., maintaining abnormal glucose tolerance, transforming into diabetes, and returning to normal glucose tolerance. Patients with abnormal glucose tolerance are most likely to return to normal after lifestyle interventions, which mainly include dietary modifications such as low glycemic diet, weight control, balanced nutrition, salt and alcohol restriction, etc., and more than 150 minutes of moderate-intensity physical exercise per week. If dietary adjustments and exercise therapy are ineffective, you can try to take metformin therapy, but metformin is mainly used to treat type 2 diabetes mellitus that is ineffective with simple dietary control and physical exercise therapy, especially obese type 2 diabetes mellitus, and it is not the first choice of treatment measures for patients with abnormal glucose tolerance. Patients with abnormal glucose tolerance should adjust their lifestyles and dietary habits under the guidance of a doctor to normalize their glucose tolerance. If medication is needed, it should be taken under the guidance of a doctor.