Although there was no difference seen in the copy number of sweet taste receptor transcripts between duodenal biopsies from T2D patients and healthy controls, the transcript number of sweet taste receptor molecules (TAS1R2, TAS1R3, Gαgust and TRPM5) was inversely correlated with blood glucose levels in T2D patients [33]. Here, TAS1R2 is linked to type 2 diabetes mellitus.