- An A1c test measures your average blood sugar levels over the previous few months.
- A fasting blood sugar test measures your blood sugar levels after an extended period of not eating (fasting), such as overnight and into the morning.
- A glucose tolerance test involves fasting, then drinking a sugary beverage and measuring your blood sugar levels over the following 2-3 hours.
- A random blood sugar test is just what it sounds like – measuring your blood sugar levels at a random time, without any special preparations.
When to get diabetes screenings
If you don’t have any risk factors for diabetes, screenings are recommended every three years. Screenings may be recommended earlier and more frequently if you:
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