The A1Ctest shows average blood sugar levels over the past 120 days. The test is done by a lab or in your doctor's office in addition to home monitoring of blood sugar. The A1C test tells whether diabetes treatment is working effectively -but 61% of diabetics recently surveyed did not know what it was. The A1C test can help diabetics adjust diet, activity and medication to avoid possible complications from the disease. Ask your doctor how often you should have an A1C test.

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