So why do we need fibre? Fibre is an important component of a healthy balanced diet. We get fibre from plant-based foods, but it’s not something the body can absorb. This means fibre is not a nutrient and contains no calories or vitamins. Fibre helps your digestive system to process food and absorb nutrients. Fibre can help to lower blood cholesterol. Fibre makes you feel fuller and so helps to control your appetite.