Type 2 Diabetes & Heart Disease: 6 Key Risk Factors & How to Manage Them

The intricate relationship between type 2 diabetes and heart disease has led some researchers to view them not as separate illnesses, but as manifestations of the same underlying condition. While managing blood sugar is a cornerstone of diabetes treatment, experts increasingly emphasize the critical need for individuals with diabetes to proactively address their heart health risk factors.

Several factors contribute to the heightened cardiovascular risk in people with diabetes. A high A1C, a measure of average blood sugar levels over three months, is strongly linked to complications affecting the kidneys, nerves and eyes, but also significantly elevates the risk of cardiovascular problems. Elevated blood sugar damages blood vessels and nerves over time, increasing vulnerability to high blood pressure, heart attack, and heart failure. Even fluctuations in blood sugar levels – known as glucose variability – can contribute to long-term heart issues, according to diabetes educator Cara Schrager.

Generally, a target A1C of less than 7 percent is recommended for individuals with diabetes. Achieving this requires a comprehensive approach encompassing medication, diet, and exercise. A dietary pattern rich in whole foods – fruits, vegetables, whole grains, and legumes – while limiting ultra-processed options is crucial. Regular physical activity, weight management, and smoking cessation are also essential components.

Continuous glucose monitoring can be a valuable tool in managing blood sugar, allowing individuals to observe how different foods and meals impact their glucose levels and build informed adjustments to their diet.

Diabetes can also lead to kidney damage, impacting the circulatory system and the kidneys’ ability to filter waste. One in three adults with diabetes develops chronic kidney disease (CKD), a progressive condition that impairs kidney function and can lead to cardiovascular disease – in fact, cardiovascular disease is a leading cause of death for those with advanced kidney disease.

High blood pressure, often a silent threat due to its lack of noticeable symptoms, is particularly common in people with type 2 diabetes. It damages blood vessel walls and can contribute to atherosclerosis, the buildup of plaque in the arteries. The development of kidney scarring and stiffening of blood vessels associated with diabetes often leads to elevated blood pressure.

Managing blood pressure involves a combination of dietary changes, exercise, weight management, and, when necessary, medication. Limiting sodium intake – aiming for no more than 1,500 milligrams daily – can have a significant impact. Increasing potassium intake, found abundantly in fruits and vegetables, can assist counterbalance the effects of sodium. Regular physical activity, even starting with a 10-minute daily walk, strengthens the heart and reduces blood pressure.

Smoking poses a substantial risk to cardiovascular health, contributing to one in four deaths from heart disease. It raises triglyceride levels, increases the likelihood of blood clots, damages blood vessels, and promotes plaque accumulation. Smoking exacerbates insulin resistance, amplifying the negative effects of diabetes on the cardiovascular system.

Quitting smoking offers immediate and long-lasting benefits, with the risk of heart disease decreasing significantly over time. After 20 years of abstinence, the risk approaches that of someone who has never smoked.

Elevated cholesterol levels, particularly LDL (“bad”) cholesterol, contribute to the buildup of plaque in the arteries, hindering blood flow. Low levels of HDL (“good”) cholesterol, which helps remove cholesterol from the bloodstream, are also problematic. Both diabetes and high cholesterol are often linked to insulin resistance and metabolic dysfunction, suggesting that healthy lifestyle changes can benefit both conditions simultaneously.

Increasing fiber intake through fruits, vegetables, whole grains, beans, and lentils can help lower LDL cholesterol.

Obesity further exacerbates heart health risks by promoting insulin resistance, inflammation, and the development of atherosclerosis. Excess visceral fat, located around the organs, contributes to blood vessel inflammation and plaque buildup. Even modest weight loss – 5 to 10 percent of body weight – can improve blood sugar levels and blood pressure.

A registered dietitian can help develop an effective eating, exercise, and lifestyle plan to support weight loss goals. Medications like semaglutide or tirzepatide, glucagon-like peptide-1 (GLP-1) receptor agonists, may also be considered in some cases.

Effective management of A1C levels is paramount in minimizing heart health risks for individuals with diabetes. By addressing blood sugar, blood pressure, and cholesterol through medication and lifestyle modifications, individuals can improve their metabolic health and reduce the risks associated with both heart disease, and diabetes.