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What is A1C (glycated hemoglobin)?

A1C (glycated hemoglobin) describes the attachment of glucose to the hemoglobin in red blood cells. When blood glucose levels are high, the percentage of glucose attached to red blood cells increases. A1C levels can be measured in a laboratory, with a fingerstick, or with a mail-in kit.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.