The gut microbiome affects the occurrence and development of metabolic diseases, with a significant amount of research focused on intestinal bacteria. As an important part of the gut microbiome, gut viruses were studied recently, particularly through fecal virome transplantation (FVT), revealing manipulating the gut virus could reverse overweight and glucose intolerance in mice. And human cohort studies found gut virome changed significantly in patients with metabolic disease. By summarizing those studies, we compared the research and analytical methods, as well as the similarities and differences in their results, and analyzed the reasons for these discrepancies. FVT provided potential value to improve metabolic diseases, but the mechanisms involved and the effect of FVT on humans should be investigated further. The potential methods of regulating intestinal virome composition and the possible mechanisms of intestinal virome changes affecting metabolic diseases were also discussed.
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