Metabolic syndrome is a major constellation of various diseases, which if left untreated has metabolic defect such as diabetes type 2 and cardiovascular disease. The concept of MetS has to be reconsidered in light of the significant data that has emerged from gut microbiome research. Possessing a thorough grasp of the MetS process will be beneficial in creating intervention tools and preventive strategies that are effective. In this chapter, we explore the relationship between the clinical manifestations of metastatic syndrome (MetS) and variations in the gut microbial community when compared to healthy persons. These variations are typified by the overgrowth of potentially detrimental bacteria and the suppression of helpful ones. Numerous mechanisms, including inflammation brought on by abnormalities in the gut barrier, the metabolism of short-chain fatty acids, and the metabolism of bile acids, have been shown to mediate the connection between the gut microbiota and host metabolism.