Among them, LADA and T2D patients had a higher percentage of GCA (PLADA vs.HC = 0.016 and PT2D vs.HC = 0.037) and GCDCA (PLADA vs.HC = 0.023 and PT2D vs.HC = 0.044), but a lower percentage of CDCA (PLADA vs.HC = 0.028 and PT2D vs.HC = 0.013) and UDCA (PLADA vs.HC = 0.012 and PT2D vs.HC = 0.027). Here, GCA is linked to type 2 diabetes mellitus.