Carbohydrates
Carbohydrates are the body's main energy source and are found in everything from fruit and vegetables to bread, pasta and sugar. The quality of the carbohydrate source matters far more for health than the amount alone.
Quality-assured by Randi Irene Norheim, Autorisert helsepersonell
What is this?
Carbohydrates are one of the three macronutrients and are found mainly in plant foods. They are typically divided into sugars, starch and fibre. Sugars and starch break down into glucose, the body's and brain's preferred energy source, while fibre largely passes through digestion unchanged.
Carbohydrate sources vary greatly in nutritional content. Whole grain products, vegetables, fruit and legumes provide carbohydrates along with fibre, vitamins and minerals, while refined sources such as white bread, biscuits and sugary drinks mostly provide energy without much other nutrition.
Carbohydrates provide four kilocalories per gram, the same as protein, and normally make up the largest share of energy intake in a balanced diet.
Why does it matter?
Carbohydrates are the most readily available energy source for the body's cells, especially the brain and muscles during physical activity. A diet with good carbohydrate sources, such as whole grains, vegetables and legumes, supports stable blood sugar, good satiety and adequate fibre intake.
The quality of carbohydrates matters more for health than the total amount. A diet dominated by refined carbohydrates and added sugar is associated with increased risk of weight gain and metabolic disturbances over time, while whole grains and fibre-rich sources appear to have the opposite effect.
Good sources
Whole grain products
Oats, whole grain bread and whole grain pasta provide steady energy and plenty of fibre.
Vegetables
Provide carbohydrates in low concentration along with plenty of fibre, vitamins and minerals.
Fruit and berries
Natural sugar combined with fibre, water and antioxidants.
Legumes
Beans and lentils provide slow-release carbohydrates and protein in the same food.
Potatoes and root vegetables
Good sources of starch, potassium and vitamin C.
What does the research say?
Research suggests that carbohydrates as a whole nutrient group are not problematic, but rather the proportion of refined and sugar-rich sources in the diet.
There is good evidence that a diet rich in whole grains and fibre-rich carbohydrate sources is associated with lower risk of cardiovascular disease and type 2 diabetes.
Studies on low-carb diets show mixed results over time, and most dietary studies suggest that overall diet quality and sustainability matter more for long-term health than a specific macronutrient split.
Common misconceptions
«Carbohydrates automatically make you gain weight.»
It's total energy intake over time, along with food quality and activity level, that determines weight development, not carbohydrates on their own.
«You should avoid carbohydrates in the evening.»
There is no good evidence that the time of day for carbohydrate intake has meaningful impact on weight or health for most people.
«All carbohydrates are equally unhealthy.»
There is a big difference between fibre-rich, whole grain-based carbohydrate sources and refined, sugar-rich versions, and they should be assessed differently.
Who should pay extra attention?
- People with diabetes, who should pay attention to the type and amount of carbohydrates in meals
- Those who are highly physically active and have increased energy needs
- People with coeliac disease, who need to choose gluten-free carbohydrate sources
- Those wanting to reduce their intake of refined carbohydrates and added sugar
Frequently asked questions
Are carbohydrates unhealthy?+
No, carbohydrates themselves are not unhealthy. What matters is the quality of the source, where whole grains, vegetables, fruit and legumes provide good nutrition, while refined and sugary versions should be eaten in smaller amounts.
Should I go low-carb to lose weight?+
Low-carb diets can work for some, but there is no good evidence that it's superior to other balanced dietary patterns in the long run. The most important thing is a diet you can sustain over time.
How much carbohydrate should I eat per day?+
There is no single right answer, but many dietary guidelines recommend that carbohydrates make up a significant share of energy intake, with emphasis on whole grains, vegetables, fruit and legumes.
What's the difference between good and bad carbohydrates?+
Good carbohydrate sources come with fibre, vitamins and minerals, like whole grains and vegetables. Refined sources, like white bread and sugary drinks, provide energy with little other nutrition.
Keep reading
Fibre
Fibre comes from plants and plays a key role in digestion, blood sugar regulation and a healthy gut microbiome. Most people in Norway eat less fibre than recommended, and it is often one of the easiest places to start when improving your diet.
6 min read
Sugar
Sugar is a natural part of many foods, but a high intake of added sugar is associated with increased risk of several health problems. Understanding the difference between natural and added sugar makes it easier to make informed choices.
5 min read
Are carbohydrates unhealthy?
No, carbohydrates are not inherently unhealthy — what matters is the type and amount you eat. Whole grains, vegetables, fruit and legumes are linked to good health, while a high intake of sugar and refined grain products should be limited.
4 min read
No two people are alike.
That is why we do not start with a diet – we start by getting to know you. SmartEating adapts advice and meals to your body, goals and daily life, so healthy choices become easier to live with over time.
