Leena Watts
Diabetics need to be careful about their blood glucose, or blood sugar, levels. A diabetic diet is one that helps manage these levels. There is no one-size-fits-all diabetic diet, but there are some general principles to follow. Diabetics should eat healthy foods from all food groups, including healthy fats like olive oil, nuts, avocados, and fish, and high-fibre foods like fresh fruits, vegetables, and whole grains. They should also limit their consumption of sugary foods and refined grains, and keep track of their carbohydrate intake. Portion sizes are also important, and these vary from person to person. Regular exercise is also recommended.
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Carbohydrates and blood sugar
Carbohydrates, or carbs, are one of the primary sources of glucose in the blood. When people eat foods containing carbohydrates, the digestive system breaks them down into sugar, which enters the bloodstream. As blood sugar levels rise, the pancreas produces insulin, a hormone that helps glucose enter the body's cells.
There are three main types of carbohydrates: starches, sugars, and fiber. Starches and sugars raise blood sugar levels, while fiber does not. Fiber is the part of plant foods that isn't digested but helps maintain health. Carbohydrates that are high in fiber are broken down more slowly, leading to a more gradual and lower rise in blood sugar.
The glycemic index ranks carbohydrates on a scale from 0 to 100 based on how quickly and significantly they raise blood sugar levels. Foods with a high glycemic index, like white bread, are rapidly digested and cause substantial fluctuations in blood sugar. On the other hand, foods with a low glycemic index, like whole oats, are digested more slowly, resulting in a more gradual increase in blood sugar. Eating many high-glycemic-index foods can lead to an increased risk of type 2 diabetes, heart disease, and other health issues.
For people with diabetes, managing blood sugar levels is crucial. Carbohydrate counting, or carb counting, is a valuable tool to help achieve this. It involves counting the number of grams of carbohydrates in a meal and matching that to the dose of insulin required. This practice can make it easier to manage blood sugar levels effectively.
It is important to note that there is no one-size-fits-all approach to managing blood sugar through diet. Individual factors such as age, weight, and activity level play a role in determining the impact of carbohydrates on blood sugar. Working with a healthcare professional or a diabetes educator can help individuals with diabetes develop a personalized meal plan that considers their unique needs and preferences.
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Portion sizes
Portion control is an important aspect of managing diabetes, as it helps regulate blood sugar levels and weight. The amount of food one consumes at each meal and snack matters, regardless of whether one has type 1 or type 2 diabetes.
Factors Affecting Portion Sizes
Several factors determine the ideal portion size for individuals with diabetes, including weight, gender, age, health, body composition, and activity levels. It is important to consult a dietitian to determine the right portion sizes for one's specific needs.
Carbohydrates and Portion Control
Carbohydrates have a significant impact on blood sugar levels. Consuming more carbohydrates than the body can handle leads to elevated blood sugar. Therefore, it is crucial to be mindful of carbohydrate intake and distribute portions accordingly. The Diabetes Plate, recommended by the American Diabetes Association, suggests filling half a plate with non-starchy vegetables, a quarter with lean protein, and the remaining quarter with grains or starches.
Plate Method
The plate method is a visual tool that helps individuals eat balanced meals and avoid overeating carbohydrate-rich foods. It involves filling half the plate with non-starchy vegetables, a quarter with lean protein, and the final quarter with grains or starches. Alternatively, one can opt for a double portion of non-starchy vegetables instead of starches.
Hand Method
Another way to estimate portion sizes is by using one's hand as a guide:
- Grains and starches: Amount equal to the size of a fist
- Meat and alternatives: Amount equal to the palm's size and the thickness of the little finger
- Fats (oils, margarine): Amount equal to the tip of the thumb
- Non-starchy vegetables: Enough to fill two cupped hands
Other Tips for Portion Control
- Use smaller plates and bowls to make portion sizes appear larger.
- Fill up on vegetables first to leave less room for high-carbohydrate or high-calorie foods.
- Keep a food diary to track portions, calories, and carbohydrates, helping with portion control and blood sugar stabilization.
- Freeze leftovers to ensure future meals are portioned correctly.
- When eating out, ask for half the meal to be packed to avoid overeating.
- Measure out snacks instead of eating directly from the container.
- Eat slowly and mindfully, allowing time for the brain to register fullness.
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Healthy fats
Diabetic diets are centred around keeping blood glucose levels healthy. While there is no one-size-fits-all diabetic diet, eating plans for diabetes have some commonalities, including eating the right foods in the right amounts at the right times.
Avocados are a great source of healthy monounsaturated fats and are also naturally sugar-free and contain fibre. Oily fish, such as sardines, are another good source of monounsaturated fats and are packed with omega-3 fatty acids, which are great for heart health and can help increase insulin function. Olive oil is another simple way to add healthy fats to your diet, drizzled over vegetables or in salad dressings. Nuts are a super-healthy snack, whether you have diabetes or not, with minimal effects on blood glucose levels.
Trans and saturated fats, which are typically solid at room temperature, should be limited in a diabetes-friendly diet. Saturated fats can increase the risk of heart disease and stroke. These fats are found in animal foods and some plant-based foods, with the biggest dietary sources being sandwiches, burgers, tacos, and burritos, as well as desserts and sweet snacks.
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Meal planning
A good meal plan will consider your goals, tastes, and lifestyle, as well as any medicines you take. It will help you get the nutrition you need and keep your blood sugar levels on target. It is important to eat at regular times and give your body two to three hours between meals to allow your blood glucose to lower to a desirable level before your next meal.
One popular method for simplifying meal planning is the Diabetes Plate. This is a low-carb meal pattern that helps you portion your plate and manage your diabetes. To use this method, start with a 9-inch plate and fill half with non-starchy vegetables, such as salad, green beans, broccoli, and spinach. Fill one quarter with a lean protein, such as chicken, beans, tofu, or eggs. The remaining quarter can be filled with quality carbohydrates. This method allows you to create perfectly portioned meals without any counting, calculating, weighing, or measuring.
Another important aspect of meal planning for diabetes is carb counting. Carbohydrates turn into glucose in the body, so it is important to monitor your carb intake to manage your blood sugar levels. You can count the number of grams of carbohydrates in a meal and match that to your dosage of insulin. This can be a helpful way to ensure you are getting the right amount of carbs at each meal.
In addition to these specific methods, there are some general guidelines to keep in mind when meal planning for diabetes. It is important to include a variety of healthy foods from all the food groups, including healthy fats, proteins, vitamins, minerals, and fibre. You may also need to cut back on sugary foods and drinks, although you can still enjoy them in moderation.
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Exercise
For people with diabetes, exercise helps to lower blood glucose levels and boost the body's sensitivity to insulin, countering insulin resistance. It also helps to control weight, lower blood pressure, lower harmful LDL cholesterol and triglycerides, raise healthy HDL cholesterol, strengthen muscles and bones, reduce anxiety, and improve general well-being. Studies have shown that exercise lowers HbA1c values in people with diabetes, and this improvement occurs regardless of medication, diet, or weight loss.
The best time to exercise is one to three hours after eating when blood sugar levels are likely to be higher. It is important to test blood sugar levels before and after exercising, especially if taking insulin, to avoid hypoglycemia. For those with type 1 diabetes, testing for blood ketones is recommended if hyperglycemia is present. Combining resistance training with aerobic training has been shown to be more beneficial than doing either alone, and it optimises glucose stability in type 1 diabetes. Resistance training and aerobic exercise have been shown to lower insulin resistance in previously sedentary older adults at risk of developing diabetes.
For older adults with diabetes, flexibility and balance exercises are important, as they can improve balance and gait, reducing the risk of falls. Group exercises, such as resistance and balance training or tai chi classes, may reduce falls by 28-29%. Yoga may also promote improvement in glycemic control, lipid levels, and body composition in adults with type 2 diabetes.
It is recommended that people with diabetes consult a healthcare provider before initiating an exercise program, especially if they are currently sedentary or have chronic complications. Low-intensity exercise with high consistency may be a safer and more effective strategy than sporadic, high-intensity exercise.
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Frequently asked questions
A diabetic diet is a way of eating that helps manage blood glucose (blood sugar) levels. It involves choosing foods that provide the right nutrients and energy for the body while keeping blood sugar levels stable.
There is no one-size-fits-all diabetic diet, but some general guidelines include:
- Eating a variety of healthy foods from all food groups.
- Focusing on whole foods and limiting highly processed foods.
- Including more non-starchy vegetables, such as broccoli, spinach, and green beans.
- Adding healthy fats like olive oil, nuts, avocados, and certain types of fish to your diet to help lower cholesterol and protect your heart.
- Choosing high-fibre foods like fresh fruits, vegetables, and whole grain breads and cereals to help control blood sugar.
- Limiting sugary foods and refined grains, such as white bread, rice, and pasta.
Foods that are high in carbohydrates and sugar can cause spikes in blood sugar levels, so it is important to limit or avoid:
- Candy, sweets, and cookies.
- Soda and other sugary drinks.
- White bread, rice, and pasta.
- Canned fruits with added sugar.
Starting a diabetic diet can be a gradual process. Here are some steps to help you get started:
- Consult your doctor or a registered dietitian to determine the right eating plan for you.
- Consider working with a diabetes educator to create a customised meal plan that fits your health needs, tastes, and lifestyle.
- Focus on making simple swaps and healthy food choices.
- Plan your meals to ensure you're getting the right nutrition and keeping your blood sugar levels stable.
- Stay hydrated by drinking plenty of water.
- Include regular exercise in your daily routine, such as a 30-minute walk.
