4 ways. Hi. Testing for diabetes can be done 4 ways: fasting serum glucose, 2-hour 75 gram oral glucose tolerance test, A1c, and random (non-fasting) serum glucose. Each has it's own diagnostic criteria, and the fasting glucose, A1c, and 2-hour post-challenge glucose also have intermediate criteria (i.e., prediabetes). Serum glucose must be used for diagnosis (i.e., NOT finger stick blood glucose).
What is the best way to diagnose pre diabetes? Id regular blood test is negative is there still a chance to have pre diabetes?
Catch early. Not every doctor would agree about when to diagnose prediabetes. Fasting blood sugar should be under 100 and anything above that is not normal and diet changes to reduce sugar and carbs would be in order. You can also check a test call HgA1c that gives an average of your blood sugars for 3 months. I always talk to my patients even if the blood sugar is only a little high. Diet helps. Read more...