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Alpha-amylase inhibitors from roselle (Hibiscus sabdariffa Linn.) tea
C Hansawasdi1, J Kawabata, T Kasai
1Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo, Japan.
Bioscience, Biotechnology, and Biochemistry
|July 6, 2000
Abstract:
A roselle (Hibiscus sabdariffa Linn.) tea extract was found to have high inhibitory activity against porcine pancreatic alpha-amylase. Hibiscus acid and its 6-methyl ester were respectively isolated as active principles from the 50% methanol and acetone extracts of roselle tea. The activity of each isolate was compared to that of structurally related citric acid, a previously known inhibitor of fungal alpha-amylase.