University of Otago Jan 21 2026 Ōtākou Whakaihu Waka nutrition experts are calling for dietary fiber to be officially recognised internationally as an essential nutrient - the first 'new' essential nutrient in more than 50 years. The researchers say fiber should sit alongside nutrients already considered essential for humans, such as certain amino acids and vitamins. Co-author Associate Professor Andrew Reynolds says increasing our dietary fiber intakes would deliver greater health benefits in