The Diabetes Diet: What Should Diabetics Eat?

Medical nutrition therapy for diabetes is a personalised approach designed to keep your blood sugar balanced and prevent potential complications. While the answer to "what should diabetics eat?" varies depending on your age, diabetes type, and lifestyle, the golden rule remains the same: choose fibre-rich foods that do not cause rapid spikes in blood sugar. By making the right food choices, you can minimise the negative effects of diabetes on your body and significantly improve your quality of life.

In brief:

• Diabetes management relies on healthy eating, regular physical activity, and medical treatment.
• Low-glycaemic index foods like oats, whole wheat, and legumes raise blood sugar slowly.
• In Type 1 diabetes, carbohydrate counting is a critical method for adjusting insulin doses.
• Obesity is the most significant risk factor for Type 2 diabetes, making weight control the cornerstone of treatment.
• Long periods of fasting can lead to hypoglycaemia (low blood sugar), so eating small, frequent meals is recommended.

What is Diabetes and Medical Nutrition Therapy?

Diabetes occurs when the pancreas produces little to no insulin—the hormone responsible for regulating how your cells use sugar in the blood. This deficiency creates a condition characterised by high blood sugar, known as hyperglycaemia, disrupting the body's metabolism of carbohydrates, proteins, and fats. The discovery of insulin in 1921 by Frederick Banting and Charles Best was a turning point in diabetes treatment. For this reason, Banting's birthday, November 14th, is commemorated globally as World Diabetes Day.

When it comes to managing the disease, medical nutrition therapy plays a role just as critical as medication and insulin. Due to poor dietary habits, sedentary lifestyles, and excess weight, the prevalence of diabetes is increasing day by day. The primary goal of nutrition therapy is to prevent blood sugar fluctuations, achieve an ideal body weight, and reduce the risk of long-term complications such as cardiovascular disease. Rather than a restrictive punishment, this therapy is the art of giving your body the nutrients it needs, in the right amounts, at the right time.

Dietary Recommendations by Diabetes Type

Diabetes is not a one-size-fits-all condition; it varies based on underlying mechanisms. Therefore, every patient's diet plan should be tailored to their specific diagnosis.

Type 1 Diabetes Diet

In Type 1 diabetes, the pancreas produces little to no insulin. This condition usually appears during childhood or adolescence, meaning patients must take external insulin for life. The most important rule in a Type 1 diabetes diet is matching the amount of carbohydrates consumed during meals with the injected insulin dose. Skipping a meal or not eating enough carbohydrates after taking insulin can cause blood sugar to drop to dangerous levels (hypoglycaemia).

Type 2 Diabetes Diet

Type 2 diabetes typically develops in adulthood and begins with the body's inability to use the insulin it produces effectively (insulin resistance). Weight control sits at the very heart of the Type 2 diabetes diet plan. Shedding excess weight increases the cells' sensitivity to insulin. Practising portion control, avoiding refined sugars, and focusing on fibre-rich foods are key steps in managing this type of diabetes.

Gestational Diabetes and Nutrition

Triggered by hormonal changes during pregnancy, gestational diabetes closely affects the health of both the mother and the baby. Persistently high blood sugar can lead to the baby growing larger than normal, causing delivery complications. Expectant mothers should follow a nutrition programme rich in protein and vitamins that supports the baby's development without causing sudden blood sugar spikes, always under the guidance of a doctor and dietitian.

What Should Diabetics Eat?

When creating your meal plan, variety is essential. The first answer to "what should diabetics eat?" is foods high in fibre. Fibre is the part of plant-based carbohydrates that the digestive system cannot break down. Aside from creating a feeling of fullness in the stomach, it ensures that blood sugar rises slowly and steadily after a meal.

If you are eating a carbohydrate-rich food, you must balance it with a source of protein or healthy fat. For example, instead of just eating an apple for a snack, pairing it with a glass of milk or a handful of raw almonds helps maintain your blood sugar balance. Whole grains, legumes (like lentils, chickpeas, and beans), fresh vegetables, and low-fat dairy products are staples that should never be missing from your table. Furthermore, to protect your cardiovascular health, you should opt for healthy fats like olive oil and keep your saturated fat intake to a minimum.

Foods to Avoid

Foods that cause blood sugar to spike rapidly (hyperglycaemia) make diabetes management difficult and pave the way for long-term organ damage. Sugar and all foods with added sugar are absorbed very quickly through the intestines into the bloodstream. For this reason, you should completely avoid traditional Turkish desserts soaked in syrup (şerbetli tatlılar), pastries, store-bought fruit juices, and fizzy drinks.

High-starch foods such as white bread, pastries, white rice pilaf, and potatoes should also be excluded from your diet. Instead, you can consider alternatives like bulgur, buckwheat, or quinoa. Processed meats (like sausages and salami) and packaged snacks containing trans fats should not be consumed, as they raise blood lipids and increase the risk of heart disease. If you have accidentally eaten a heavily sugared meal, you can read our article Balancing the Body After Sugar Consumption: Healthy Recovery Tips to learn how to help your body recover.

What is the Glycaemic Index?

The glycaemic index (GI) is a measurement system indicating how quickly carbohydrate-containing foods raise blood sugar after consumption. In this system, pure glucose is assigned a value of 100, and other foods are scored between 0 and 100 accordingly. Foods with a low glycaemic index (55 and below) break down more slowly in the digestive system, raising blood sugar gradually.

Foods such as oats, whole wheat bread, green lentils, chickpeas, apples, and plain yoghurt have a low glycaemic index. On the other hand, foods like white bread, white rice, watermelon, and mashed potatoes have a high glycaemic index and cause sudden spikes in blood sugar when eaten. The fundamental strategy in a diabetes diet is to choose low-GI foods over high-GI ones to maintain a feeling of fullness throughout the day and prevent sugar fluctuations.

What is Carbohydrate Counting?

Carbohydrate counting is an advanced meal planning method developed specifically for Type 1 diabetics and Type 2 diabetics who use insulin. It is based on calculating the amount of carbohydrates in consumed foods in grams.

Using this method, the patient calculates the total carbohydrates in their upcoming meal and determines their own pre-meal insulin dose based on the insulin-to-carbohydrate ratio set by their doctor. Carbohydrate counting provides patients with great dietary flexibility. When a favourite food is to be eaten, blood sugar balance can be maintained by adjusting the insulin dose to match the carbohydrate intake. However, for this method to be successful, detailed training alongside a specialist dietitian is absolutely essential.

Sample Diabetes Diet Plan

A diabetes diet must be entirely personalised; portions vary according to age, weight, gender, and physical activity level. However, to give a general idea, a sample diabetes diet plan aimed at balancing blood sugar might look like this:

For a traditional Turkish breakfast, you might have one boiled egg, a slice of low-fat white cheese (beyaz peynir), plenty of fresh greens (like parsley, dill, and cucumber), a few unsalted olives, and one or two slices of whole rye bread. For lunch, an olive oil-based vegetable dish, a bowl of yoghurt or tzatziki (cacık), paired with bulgur pilaf or whole wheat bread is a great choice.

Snacks are crucial for preventing long periods of fasting. A portion of fresh fruit (such as a green apple) alongside a handful of raw almonds or walnuts makes an ideal snack. For dinner, you can finish the day lightly and healthily with a protein source like grilled fish, chicken, or baked meatballs (köfte), accompanied by a large green salad and a bowl of soup.

Diabetes Symptoms and Complications

Diabetes can progress silently in the body and may go unnoticed in its early stages. The most characteristic symptoms include excessive thirst (polydipsia), frequent urination (polyuria), dry mouth, a constant feeling of hunger, unexplained weight loss, and blurred vision. These symptoms occur as the body tries to excrete excess blood sugar through the kidneys, leaving the cells deprived of energy.

If blood sugar remains high for an extended period, the body's entire vascular and nervous systems begin to suffer damage. Poorly controlled diabetes can lead to elevated blood pressure and blood lipids, kidney failure, damage to the retina (diabetic retinopathy), and non-healing wounds on the feet. To get more comprehensive information about the symptoms of the disease, you can read our article What is Diabetes and What Are Its Symptoms?.

When Should You See a Doctor?

In diabetes management, certain situations require urgent medical intervention. If your blood sugar is consistently high (250 mg/dL and above) or very low (70 mg/dL and below) despite your diet and medication, you should consult your doctor without delay.

If you experience any of the following danger signs, you should immediately go to the nearest emergency department or call 112:

• Confusion, difficulty speaking, or a feeling of fainting
• A heavy, acetone-like (rotten apple) smell on the breath
• Uncontrollable vomiting accompanied by severe abdominal pain
• Deep and very rapid breathing
• Blood sugar reading as "HI" (too high to measure) on home monitors

Diabetes Diagnosis and Follow-Up at BHT CLINIC

Diabetes is a lifelong condition, but with the right steps, it can be managed exceptionally well. At BHT CLINIC İstanbul Tema Hastanesi, the diagnosis and treatment of diabetes are handled with a multidisciplinary approach. While our Internal Medicine and Endocrinology departments serve adult patients, our Paediatric Endocrinology department manages the diagnosis and treatment of childhood diabetes cases using the latest medical approaches.

Our emergency department, providing 24/7 service, is fully equipped to intervene rapidly in the event of sudden blood sugar fluctuations. Our diabetes education nurses and specialist dietitians aim to improve your quality of life by creating personalised nutrition programmes. For a comprehensive evaluation and a tailored treatment plan, you can book an appointment to consult with our specialist physicians.

Frequently Asked Questions

Can diabetics eat honey?

Although honey is a natural food, it raises blood sugar very rapidly due to its high fructose and glucose content. Therefore, it is not recommended for diabetics to consume sugar-dense foods like honey, molasses (pekmez), or jam. In very rare cases, it may be used for emergency intervention during severe hypoglycaemia (low blood sugar).

Which fruits can diabetics eat?

Diabetics can eat fruit, provided they pay careful attention to portion control. Fruits with a low glycaemic index, such as apples, pears, peaches, plums, and strawberries, should be preferred. The consumption of high-sugar fruits like melon, watermelon, figs, and grapes must be kept much more limited and should always be eaten alongside a protein source like milk or nuts.

Can you lose weight on a diabetes diet?

Yes, because the diabetes diet is a healthy, balanced, and portion-controlled nutrition model, it helps shed excess weight. Especially in Type 2 diabetes patients, losing even 5% to 10% of body weight can break insulin resistance and significantly ease blood sugar control.

Can diabetics eat bread?

Diabetics can eat bread, but the type and amount of bread are crucial. Breads made from white flour should be avoided as they cause blood sugar to spike rapidly. Instead, high-fibre, slow-digesting whole wheat, rye, or oat breads can be safely consumed, provided you do not exceed the number of slices determined by your dietitian.

What should be eaten during hypoglycaemia?

When blood sugar drops below 70 mg/dL (hypoglycaemia), simple carbohydrates that will quickly enter the bloodstream should be consumed. In this situation, 3-4 sugar cubes, half a small glass of fruit juice, or a tablespoon of honey can be lifesaving. Once blood sugar returns to normal, a small snack like cheese and bread should be eaten to prevent it from dropping again.

This article is for informational purposes only; please consult your physician for diagnosis and treatment.