Fibre is the non-digestible part of plant foods that is found in whole fruits and vegetables, nuts, seeds, whole grains and legumes, like greens, peas and lentils. Dietary fibre is broken down into two main categories: soluble fibre, which dissolves in water and can be broken down by the good bacteria in our gut, and insoluble fibre helps prevent constipation. Both are important, because fibre can help regulate blood sugar, lower cholesterol, feed the good bacteria in your gut, reduce the risk of heart disease, prevent constipation and help you feel (and stay) full. fibre also acts a prebiotic, providing nourishment to beneficial gut bacteria.