High A1C levels indicate that your blood sugar has been consistently elevated, which can significantly impact your blood pressure. When blood sugar is high, it can lead to insulin resistance, causing your kidneys to retain more sodium and fluid, increasing blood volume and raising blood pressure. Additionally, high blood sugar damages the lining of your blood vessels, making them stiffer and narrower, which forces your heart to work harder, further elevating blood pressure. Inflammation is anoth

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