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Eating muesli, fruits and vegetables every morning may lead to stronger bones and help prevent arthritis, scientists say. Researchers at Friedrich-Alexander-Universitat Erlangen- Nurnberg (FAU) in Germany discovered that a fibre-rich diet can have a positive influence on chronic inflammatory joint diseases, leading to stronger bones. The key to the effect our diet has on our health are intestinal bacteria, researchers said.
Every adult carries about two kilogrammes of benign bacteria in their intestines. They help our digestion by breaking fibre down into its individual components, which can then be absorbed by the body. A by-product of this process are short-chained fatty acids which are important for the body, providing energy, stimulating intestinal movement and having an anti- inflammatory effect. The intestinal bacteria also fight against pathogens which have found their way into the gastrointestinal tract. It is known that intestinal flora can either protect against illness or cause illness, depending on its composition. In the study published in the journal Nature Communications, researchers showed that it is not the intestinal bacteria themselves, but rather their metabolites which affect the immune system and therefore have a knock-on effect on autoimmune diseases such as rheumatoid arthritis. How intestinal bacteria and the immune system communicate is still unclear, and scientists are still unsure about what may be done to have a positive effect on the bacteria. The researchers focused on the short-chain fatty acids which are formed during the fermentation processes caused by intestinal bacteria. These fatty acids can be found, for example, in the joint fluid and it is assumed that they have an important effect on the functionality of joints. Scientists showed that a healthy diet rich in fibre is capable of changing intestinal bacteria in such a way that more short-chained fatty acids are formed. "We were able to show that a bacteria-friendly diet has an anti-inflammatory effect, as well as a positive effect on bone density," said Mario Zaiss, who led the study. "Our findings offer a promising approach for developing innovative therapies for inflammatory joint diseases as well as for treating osteoporosis, which is often suffered by women after the menopause," said Zaiss. "We are not able to give any specific recommendations for a bacteria-friendly diet at the moment, but eating muesli every morning as well as enough fruit and vegetables throughout the day helps to maintain a rich variety of bacterial species," he said.
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