What is Insoluble Dietary Fibre?
Insoluble dietary fibre is a type of fibre that does not dissolve in water and remains structurally intact as it moves through the digestive system. Its primary role is to add bulk to the diet, helping to support normal digestive function and maintain regular bowel movements as part of a balanced diet. Unlike soluble fibres, which can form gels or viscous solutions, insoluble fibres stay firm and fibrous, contributing to texture, hydration control and structural integrity in food and beverage applications. Common sources include whole grains, cereal brans, nuts, seeds and the skins of fruits and vegetables. For manufacturers, insoluble dietary fibre offers functional benefits such as improving crumb structure, enhancing texture, reducing moisture migration and supporting clean‑label fibre enrichment across a wide range of formulations.

