Fibre is a valuable part of a healthy diet. The largely indigestible foodstuffs are a feast for intestinal bacteria, which produce short-chained fatty acids from them. These short-chained fatty acids have a positive effect on inflammatory diseases such as rheumatoid arthritis. If arthritis patients eat a fibre-rich diet this leads to an increase in the number of regulatory t-cells which combat autoimmune reactions, in other words reactions in which the body’s immune system attacks the organism itself.