Foods to Avoid if You Have Type 2 Diabetes, Health Experts Explain

Type 2 diabetes affects hundreds of millions of people around the world.

It develops when the body does not respond properly to insulin, a hormone that helps move sugar from the blood into cells for energy. As a result, too much sugar can remain in the bloodstream.

Over time, high blood sugar can harm blood vessels and organs throughout the body. It can increase the risk of heart disease, kidney disease, vision problems and nerve damage. Food choices are therefore an important part of keeping diabetes under control.

One of the most important things to limit is sugary drinks. Soft drinks, energy drinks, sweetened tea, flavored coffee and some fruit drinks can contain large amounts of added sugar. Because they are liquids and usually contain little fiber, their sugar can enter the bloodstream quickly.

Research published in Diabetes Care has linked regular consumption of sugary drinks with a higher risk of developing type 2 diabetes. For people who already have diabetes, these drinks can also make blood sugar harder to manage. Water, sparkling water and unsweetened tea are usually better everyday choices.

Refined carbohydrates can cause similar problems. White bread, many breakfast cereals, pastries, crackers, white rice and other highly processed grain foods often contain less fiber than whole-grain alternatives. The body can break them down quickly, causing blood sugar to rise faster.

Research published in The American Journal of Clinical Nutrition has examined how the quality of carbohydrates in the diet affects diabetes and blood sugar control. Higher-fiber choices such as oats, barley, brown rice and whole-grain bread are generally digested more slowly. Fiber can also help people feel full for longer.

Fried and highly processed foods are another concern. French fries, fried chicken, chips and many fast-food meals can contain large amounts of calories, salt and saturated fat. Eating these foods frequently can contribute to weight gain and unhealthy cholesterol levels, both of which matter for people with diabetes.

Heart health is particularly important because diabetes already raises the risk of cardiovascular disease. Research published in the Journal of the American College of Cardiology has shown that unhealthy dietary fats, including trans fats, can harm cardiovascular health. Replacing them with healthier unsaturated fats is generally a better choice.

Processed meats such as bacon, sausages, hot dogs and salami are also best limited. They can be high in salt and saturated fat, and studies have linked frequent consumption with poorer long-term health. Research published in BMJ has reported associations between processed meat consumption and a higher risk of type 2 diabetes.

Healthier protein choices include fish, chicken, eggs, beans, lentils and tofu. Fish such as salmon and sardines also provide omega-3 fats, which are beneficial for heart health. The best choice still depends on a person’s overall diet, health needs and any advice from their healthcare team.

Another trap can be packaged foods advertised as “low-fat,” “diet” or “healthy.” Removing fat does not automatically make a product healthier, and some products contain added sugar, refined starches or other ingredients that can raise blood sugar. Checking the nutrition label can reveal how much added sugar and carbohydrate a product actually contains.

Cakes, cookies, sweets, doughnuts, pastries and ice cream can also cause blood sugar to rise quickly, especially when eaten in large portions. People with diabetes do not necessarily have to completely avoid every dessert. Smaller portions and less frequent servings can sometimes be included in an individual eating plan.

A diabetes-friendly diet is usually built around minimally processed foods rather than a long list of forbidden foods. Vegetables, beans, whole grains, nuts, seeds, lean proteins and healthy fats can provide important nutrients while helping with blood sugar control. Whole fruit can also be part of a healthy diet because it contains fiber as well as natural sugar.

Regular physical activity adds another layer of protection. Walking, cycling, swimming and other forms of exercise can help the body respond better to insulin and use glucose for energy. Even modest changes in daily activity and eating habits can add up over time.

The studies discussed in this article were published in Diabetes Care, The American Journal of Clinical Nutrition, the Journal of the American College of Cardiology, BMJ, and Nutrition & Diabetes. Together, the research supports a simple message: limiting sugary drinks and heavily processed foods while choosing more whole foods can make blood sugar easier to manage.

People with type 2 diabetes have different medical needs, medicines and blood sugar targets, so there is no single perfect diet for everyone. A doctor or dietitian can help create an eating plan that fits an individual’s health and lifestyle. Small, sustainable changes are often more useful than trying to follow an extremely restrictive diet.