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.

❤️ What Is A1c and Why It Matters

A1c reflects your average blood sugar over the past two to three months. Unlike fingerstick readings, which offer a moment-in-time snapshot, A1c reveals your overall glucose exposure.

• A normal A1c is below 5.7%

• Prediabetes is diagnosed between 5.7% and 6.4%

• Diabetes is confirmed with A1c levels above 6.4%

Higher A1c levels mean higher average blood sugar, which affects nearly every system in the body, especially the heart and blood vessels.

🧬 How Elevated A1c Contributes to Heart Disease

Even moderate elevations in blood sugar can:

• Damage the lining of blood vessels, making them more prone to plaque buildup

• Increase inflammation and oxidative stress, which accelerates atherosclerosis

• Raise LDL cholesterol and triglycerides while reducing protective HDL cholesterol

• Make blood thicker and stickier, increasing the risk of clot formation

Over time, these changes raise the likelihood of a heart attack, stroke, or sudden cardiac event. Many people don’t notice any symptoms before the damage is already significant.

❗ Why This Happens Without Warning

Unlike chest pain or shortness of breath, elevated A1c doesn’t produce obvious daily symptoms. Many people with prediabetes or diabetes feel normal for years while silent damage builds.

Some may not even know they have high blood sugar unless they get tested.

🔍 Who’s at Greater Risk?

You may be at increased risk of heart-related complications from high A1c if you:

• Have a personal or family history of heart disease

• Are living with diabetes or prediabetes

• Have high blood pressure or high cholesterol

• Carry visceral fat around your abdomen

• Smoke or have a sedentary lifestyle

The risk multiplies when several factors are present at once.

✅ What You Can Do

• Get your A1c tested regularly, even if you feel fine

• Aim for consistent blood sugar control through diet, movement, and medication

• Monitor blood pressure and cholesterol levels as part of your overall heart health

• Use continuous glucose monitoring (CGM) if recommended by your provider

• Ask your care team about additional heart screenings if your A1c is elevated

📅 Want to Lower Your Risk and Gain Clarity?

Reach7 offers on-site A1c testing, cardiovascular panels, and full metabolic reviews to help you understand your risk and take action.

Book your visit today and take proactive steps to protect your heart before symptoms appear.