By Mayo Clinic Staff

A diabetes diet simply means eating the healthiest foods in moderate amounts and sticking to regular mealtimes. It's a healthy-eating plan that's naturally rich in nutrients and low in fat and calories. Key elements are fruits, vegetables and whole grains. In fact, this type of healthy-eating plan can be good for most people.

If you have diabetes or prediabetes, your healthcare professional will likely recommend that you see a dietitian to help you develop a healthy-eating plan. The plan helps you manage your blood sugar, also called blood glucose, manage your weight and heart disease risk factors. These factors include high blood pressure and high cholesterol.

When you eat extra calories and carbohydrates, your blood sugar level rises. If blood sugar isn't managed, it can lead to serious issues. These issues include a high blood sugar level, called hyperglycemia. If this high level lasts for a long time, it may lead to long-term complications, such as nerve, kidney and heart damage.

You can help keep your blood sugar level in a safe range. Make healthy food choices and track your eating habits.

For most people with type 2 diabetes, weight loss also can make it easier to manage blood sugar. Weight loss offers a host of other health benefits. If you need to lose weight, a healthy-eating plan provides a well-organized, nutritious way to reach your goal safely.

A diet for people living with diabetes is based on eating healthy meals at regular times. Eating meals at regular times helps your body better use insulin that it makes or gets through medicine.

A registered dietitian can help you put together a diet based on your health goals, tastes and lifestyle. The dietitian also can talk with you about how to improve your eating habits. Options include choosing portion sizes that suit your needs for your size and activity level.

Make your calories count with nutritious foods. Choose healthy carbohydrates, fiber-rich foods, fish and "good" fats.

During digestion, sugars and starches break down into blood glucose. Sugars also are known as simple carbohydrates, and starches also are known as complex carbohydrates. Focus on healthy carbohydrates, such as:

• Fruits.
• Vegetables.
• Whole grains.
• Legumes, such as beans and peas.
• Low-fat dairy products, such as milk and cheese.

Avoid less healthy carbohydrates, such as foods or drinks with added fats, sugars and sodium.

Dietary fiber includes all parts of plant foods that your body can't digest or absorb. Fiber moderates how your body digests food and helps manage blood sugar levels. Foods high in fiber include:

• Vegetables.
• Fruits. For the most fiber benefit, eat whole fruits rather than drinking fruit juice.
• Nuts.
• Legumes, such as beans and peas.
• Whole grains.

Eat heart-healthy fish at least twice a week. Fish such as salmon, mackerel, tuna and sardines are rich in omega-3 fatty acids. These omega-3s may prevent heart disease. Avoid fried fish.

If you are pregnant, are planning to get pregnant or are breastfeeding, do not eat fish that's typically high in mercury. This includes shark, swordfish, king mackerel and tilefish.

Foods containing monounsaturated and polyunsaturated fats can help lower your cholesterol levels. These include:

• Avocados.
• Nuts.
• Canola, olive and peanut oils.

But don't overdo it, as all fats are high in calories.

Diabetes raises your risk of heart disease and stroke by raising the rate at which you develop clogged and hardened arteries. Foods containing the following can work against your goal of a heart-healthy diet.

• Saturated fats. Avoid high-fat dairy products and animal proteins such as butter, beef, hot dogs, sausage and bacon. Limit coconut and palm kernel oils.
• Trans fats. Avoid trans fats found in processed snacks, baked goods, shortening and stick margarines.
• Cholesterol. Cholesterol sources include high-fat dairy products and high-fat animal proteins, egg yolks, liver, and other organ meats. Aim to keep dietary cholesterol as low as possible through healthy eating, rather than aiming for a specific milligram limit.
• Sodium. Aim for no more than 2,300 milligrams (mg) of sodium a day. Your healthcare professional may suggest you aim for a smaller amount if you have high blood pressure.

You may use a few different approaches to create a healthy diet to help you keep your blood sugar level within a typical range. With a dietitian's help, you may find that one or a combination of the following methods works for you.

The American Diabetes Association offers a simple method of meal planning. It focuses on eating more vegetables. Follow these steps when preparing your plate:

• Fill half of your plate with nonstarchy vegetables, such as spinach, carrots and tomatoes.
• Fill a quarter of your plate with a lean protein, such as fish, lean pork or chicken.
• Fill the last quarter with a carbohydrate, such as brown rice or a starchy vegetable, such as green peas.
• Include "good" fats such as nuts or avocados in small amounts.
• Add a piece of fruit or a serving of dairy and a drink of water or unsweetened tea or coffee.

Because carbohydrates break down into sugar, they have the greatest effect on your blood sugar level. To help manage your blood sugar, you may need to learn to figure out the amount of carbohydrates you are eating with the help of a dietitian. You can then adjust the dose of insulin accordingly. It's important to keep track of the amount of carbohydrates in each meal or snack.

A dietitian can teach you how to measure food portions and become an educated reader of food labels. You also can learn how to pay special attention to serving size and carbohydrate content.

A dietitian may recommend you choose specific foods to help plan meals and snacks. You can choose a number of foods from lists that include categories such as carbohydrates, proteins and fats.

One serving in a category is called a choice. Each food choice has about the same amount of carbohydrates, protein, fat and calories — and the same effect on your blood sugar — as a serving of every other food in that same category. For example, carbohydrate lists that include starch, fruits and milk have choices that are each 15 grams of carbohydrates.

Some people who live with diabetes use the glycemic index to select foods, especially carbohydrates. This method ranks food that contains carbohydrates based on their effect on blood sugar levels. Talk with your dietitian about whether this method might work for you.

Embracing a healthy-eating plan is the best way to keep your blood sugar level under control and prevent diabetes complications. And if you need to lose weight, you can tailor the plan to your specific goals.

Aside from managing your diabetes, a healthy-eating plan offers other benefits too. Because this plan recommends generous amounts of fruits, vegetables and fiber, following it is likely to lower your risk of cardiovascular diseases and certain types of cancer. And eating dairy products and other foods rich in calcium can help keep bones healthy and strong.

If you live with diabetes, it's important that you partner with your healthcare professional and dietitian to create an eating plan that works for you. Use healthy foods, portion control and a schedule to manage your blood sugar level. If you don't follow your prescribed diet, you run the risk of blood sugar levels that change often and more-serious complications.