Abstract
Humans have trillions of different bacteria in their guts, including symbiotic species, opportunistic pathogens, and commensal organisms. This microbiota is essential for digestion, aids in the absorption and synthesis of some nutrients, and releases their metabolites. These metabolites may supply a range of growth-promoting and growth-inhibiting substances that may have an indirect or direct impact on human health. A person's daily diet affects the balance of microbial species, especially the majority species that are involved in the fermentation of various substrates. As a result, an unbalanced diet may contribute to the development and spread of human diseases. These include cancer, depression, cancer, inflammatory diseases, and infant health and longevity. The explanation of how nutrition impacts gut health in people will be abridged in this review article.
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