Recently, several studies have also been conducted on the link between FMT and DM2: in Yej’s review of 2022, it is reported that fecal transplantation can reduce hyperglycemia, improve insulin resistance and insulin sensitivity, inhibit levels of chronic pancreatic inflammation, reduce β-cell apoptosis, increase beneficial bacteria such as Bifidobacterium, and reduce sulfate-reducing bacteria (Desulfovibrio and Bilophila) [61]. Here, INS is linked to Insulin resistance.