What are the official diagnostic criteria for type 2 diabetes (A1C, fasting glucose)?

0 mmol/L or higher, usually confirmed with a repeat test on a different day unless symptoms and a very high result make the diagnosis clear immediately. Prediabetes sits in the range just below these cutoffs. References: https://obesitycanada.ca/healthcare-professionals/adult-clinical-practice-guideline/ https://guidelines.diabetes.ca/GuideLines/media/Docs/Quick%20Reference%20Guide/2024-CPG-Quick-Reference-Guide.pdf