Studies on the bioactivity of aqueous extract of pu-erh tea and its fractions: In vitro antioxidant activity and α-glycosidase inhibitory property, and their effect on postprandial hyperglycemia in diabetic mice

Despite abundant research that has been carried out on the potential health benefits of pu-erh tea, no consensus till now, has been reached on which constituent is mainly responsible for its bioactivity. In this work, the aqueous extract (AE) and its fraction enriched with active constituents were prepared from pu-erh tea, and their bioactivities were investigated. It was found that tea polyphenols (TP), tea polysaccharides (TPS), caffeine...