What is fiber and why is it important?
Fiber is the indigestible part of plant foods that passes through our digestive system almost unchanged. It is divided into soluble and insoluble fiber. Soluble fiber dissolves in water and forms a gel-like substance that helps lower cholesterol and blood glucose levels. Insoluble fiber increases stool volume and speeds up the passage of food through the digestive tract.
How much fiber do we need?
Recommended daily fiber intake varies depending on age and gender. For adult men, 30–38 grams per day are recommended, and for adult women, 21–25 grams. Unfortunately, most people do not reach these recommendations. In the USA, the average adult consumes only 10 to 15 grams of fiber daily.
Signs of fiber deficiency
- Digestive problems: Frequent constipation or irregular bowel movements can indicate a lack of fiber. Fiber increases stool volume and speeds up its passage through the intestines.
- Increased appetite: Fiber contributes to a feeling of fullness. Without it, hunger can occur quickly, leading to overeating.
- Elevated cholesterol: Soluble fiber helps lower LDL (bad) cholesterol levels.
- Weight fluctuations: A low-fiber diet is associated with an increased risk of weight gain.
Fiber and heart health
Numerous studies have shown that fiber intake reduces the risk of heart disease. Fiber helps lower cholesterol and blood pressure and improves blood vessel function.
- Fiber and body weight
Fiber contributes to a feeling of fullness, which can help with weight control. One study showed that increasing fiber intake by 1 gram per day leads to a reduction in body weight by 0.25 kg. - Fiber and diabetes
A fiber-rich diet can help control blood sugar levels. Soluble fiber slows the absorption of sugars, preventing rapid spikes in blood glucose. - Fiber and digestion
Fiber improves digestion and prevents constipation. It increases stool volume and speeds up its passage through the intestines.
How to increase your fiber intake?
- Choose whole grain products: Instead of white bread and pasta, choose whole grain versions.
- Eat more fruits and vegetables: Especially beneficial are apples, pears, broccoli, and carrots.
- Add legumes: Beans, lentils, and chickpeas are excellent sources of fiber.
- Use nuts and seeds: Almonds, flaxseeds, and chia seeds are rich in fiber.
Fiber is essential for our health. It aids digestion, weight control, lowers cholesterol and blood sugar levels, and reduces the risk of many chronic diseases. By including more fiber in your diet, you can make an important step toward better well-being and health.
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