04/21/2026
A1c is most often used to track long-term blood sugar control in people with diabetes, but its impact extends far beyond glucose management. Research shows that higher A1c levels are directly linked to an increased risk of heart attacks, even in people who feel relatively well or don’t yet have symptoms.
The danger? This damage can happen quietly and gradually, without obvious signs, until a serious cardiac event occurs.
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Higher A1c levels are linked to blood vessel damage and increased heart attack risk. Learn how elevated blood sugar affects the heart and why testing matters.