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CLINICAL KNOWLEDGE MAGAZINE
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Carbohydrate substitutes in diabetes – use and calculation
Isabella Taylor
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Diets Premium Medical Expert • 16.03.2026
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Scientifically reviewed by a clinical dietitian:
This article has been peer-reviewed for adherence to IŻŻ, WHO, and PTGiP clinical nutritional standards.
| CLINICAL KNOWLEDGE MAGAZINE CLINICAL KNOWLEDGE MAGAZINE | min read 7 min |
| Diets Premium Medical Expert Isabella Taylor | Scientifically reviewed by a clinical dietitian 16.03.2026 |
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Key Takeaways
For individuals suffering from type 1 and type 2 diabetes, diet is an extremely significant aspect of their life, exerting a strong influence on their health and well-being. In this case, a diet with a restriction of easily digestible carbohydrates is recommended. Both meticulous selection and monitoring of the quantity of food items in the diet are essential. However, it can be problematic to establish an appropriate diet if one is not a specialist in nutrition, especially for those who have just discovered their condition and possess no knowledge about it. Therefore, the concept of carbohydrate substitutes has been devised to facilitate the composition of the correct diet.
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Diabetes and metabolizable carbohydrates
A fundamental aspect of the diet for individuals with diabetes is maintaining stable blood glucose levels. In this context, what role do metabolizable carbohydrates play? They are digested and absorbed in the small intestine and, upon consumption, elevate blood glucose levels, particularly glycogen, monosaccharides, and disaccharides. Conversely, non-metabolizable carbohydrates such as fiber do not affect blood glucose. Furthermore, research indicates that the same carbohydrate content in different foods can yield varying glycemic responses, depending on the rate of glucose increase post-consumption. Consequently, the glycemic index (GI) was established. It is advisable to select products with a low GI (below 55) or moderate GI (56–69). However, metabolizable carbohydrates cannot be entirely excluded from the diet, as they constitute the primary energy source, including the sole energy required for brain function. Additionally, they regulate metabolic processes, serve as building blocks for cellular structures, and participate in water and mineral metabolism.
Carbohydrate exchange systems for diabetes management
A diabetes diet is designed to supply the body with essential energy and nutrients, maintain a healthy weight and stable blood glucose levels, and prevent complications. It plays a crucial role in treatment, equally as important as pharmacotherapy. In some cases, diet alone can balance diabetes. The Polish Diabetes Society estimates that 2.6 million people in Poland have diabetes. Due to its widespread occurrence across all age groups, patient education in self-managing their diet has become essential, particularly when taking medications or insulin. To facilitate this, carbohydrate exchange systems have been developed, enabling easy meal planning without requiring specialized knowledge or access to product tables with glycemic indices.
How to properly use carbohydrate substitutes?
To effectively utilize substitutes, one must understand their classification and the various types. There are three types of substitutes: a carbohydrate substitute (WW)-1, meaning the amount of a product that provides 10 g of absorbable carbohydrates; a protein substitute (WBz-1), meaning the amount of a product that provides 10 g of animal protein; a fat substitute (WT)-1, meaning the amount of a product that provides 10 g of added fat, which constitutes 2/3 to 3/4 of the total fat intake. To apply substitutes, one must grasp the fundamental principles of a diet restricting easily digestible carbohydrates. 1. The caloric value considering physical activity: bedridden patient 20-25 kcal/kg bw, non-working 25-30 kcal/kg bw, light work 30-35 kcal/kg bw, heavy work 35-40 kcal/kg bw. 2. The caloric value considering body weight: underweight patients 2400-3000 kcal/day, overweight or obese patients with low physical activity 1000-1300 kcal/day, overweight or obese patients with moderate physical activity 1500-1800 kcal/day. 2. Protein 15-20% of energy needs or 1-1.5 g/kg bw. 3. Fats 25-35% of energy needs. 4. Absorbable carbohydrates 45-50% of energy needs, at least 100 g, maximum 300 g
Calculating Carbohydrate Exchange Values for Dietary Planning
To thoroughly grasp the fundamental principles of using exchange values in dietary planning, it is essential to break down the entire process into several key stages. We will examine a specific case: a 30-year-old woman, weighing 65 kg, standing 166 cm tall, engaged in light physical labor, and diagnosed with type 2 diabetes. Each step will be explained in detail to ensure a comprehensive understanding of the underlying mechanisms.
Isabella Taylor
Diets Premium Medical Expert
Member of the Diets Premium clinical editorial board. Specializes in medical diet therapy, metabolic health, and nutritional planning.
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