Sucralose and Lactisole Additions to OGTT in Humans

In the present study, our objective was to determine whether T1R2-T1R3 influences glucose metabolism bidirectionally via hyperactivation with sucralose and inhibition with sodium lactisole in mixture with glucose loads during tolerance tests in humans. In 12 healthy participants we conducted oral glucose tolerance tests (OGTTs) of 75 g glucose with and without the addition of the T1R2-T1R3 agonist, sucralose (5 mM). We also conducted OGTTs in 10 healthy participants with and without the addition of a T1R2-T1R3 antagonist, sodium lactisole (2 mM). Plasma glucose, insulin, and glucagon were measured before, during, and after OGTTs up to 120 minutes post-prandially. We also assessed individual participants' sweet taste responses to sucralose, their sensitivities to sweetness inhibition by lactisole, and their BMIs.