Our gut harbours a complex community of over 100 trillion microbial cells which influence human physiology, metabolism, nutrition and immune function, while disruption to the gut microbiota has been linked with gastrointestinal conditions such as inflammatory bowel disease and obesity. The gut microbiota is by many considered a hidden metabolic organ of its own, with 70–80% of our total immune cells present. While research is rapidly catching up, the growing knowledge on the matter indicates that the impact of nutrition on the composition of the gut microbiota and the immune system elucidates the role nutrition can play in improving health.
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