Rebaudioside A

Rebaudioside A is a glucosylated steviol glycoside studied and used as a non-glycemic sweetener. It is one of the predominant steviol glycosides isolated from S. rebaudiana leaves. Rebaudioside A is a alpha-glucosidase inhibitor with (IC50=35µg/ml) and can inhibit ATP-sensitive K+-channels. In vitro rebaudioside A stimulated the insulin secretion from MIN6 cells in a dose- and glucose-dependent manner. It increases glucagon-like peptide 1 (GLP-1) secretion in a 2-dimensional mouse intestine model. Rebaudioside A is metabolized by gut microbiota to steviol. Rebaudioside A shows antioxidant activity on reducing cellular reactive oxygen species. It is an activator of Nrf2 and is a potential candidate hepatoprotective agent.