Professor Andrew Smith of Cardiff University's School of Psychology, tested a group of volunteers over a four week period. Measures taken at baseline showed that those that regularly consumed a high-fibre diet were less emotionally distressed; had fewer cognitive difficulties; had a more positive mood; had less difficulty falling asleep and had lower depression scores than those people who ate a low-fibre diet.
The results from the intervention showed that those who included Kellogg's All-Bran and Kellogg's Bran Flakes reported a 10 per cent reduction in fatigue.
Professor Smith commented, "The physical benefits of a high-fibre diet have been widely acknowledged amongst healthcare professionals for many years, however this is the first time high-fibre intake has been associated with improved mental health."
Dr. Kathryn O'Sullivan, Head of Nutrition Affairs at Kellogg's, says: "This new study is very important and reveals that a bowl of high-fibre cereal is now scientifically shown to have a great impact on physical and mental wellbeing".
"Eight out of ten people do not eat enough fibre and are forfeiting the emotional and physical benefits that fibre is proven to provide."
Kellogg's All-Bran and Kellogg's Bran Flakes are extremely rich sources of natural grain fibre. For example, one bowl of Kellogg's All-Bran provides over 50 per cent of daily fibre needs, which is as much as five slices of wholemeal bread or seven bowls of brown rice.