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BACKGROUND   Emblica officinalis , known as amla in Ayurveda, has been used as a folk medicine to treat numerous pathological conditions, including diabetes. However, the novel extract of  E. officinalis  fruit extract (amla fruit extract, AFE, Saberry®) containing 100 g kg −1   β ‐glucogallin along with hydrolyzable tannins has not yet been extensively studied for its antidiabetic potential.    OBJECTIVE  The aim of this study was to investigate the antidiabetic and antioxidant activities of AFE and its stability during gastric stress as well as its thermostability.    METHODS  The effect of AFE on the inhibition of pancreatic  α ‐amylase and salivary  α ‐amylase enzymes was studied using starch and yeast  α ‐glucosidase enzyme using 4‐nitrophenyl  α ‐ d ‐glucopyranoside as substrate. Further, 2,2‐diphenyl‐1‐picrylhydrazyl radical scavenging and reactive oxygen species inhibition assay was performed against AFE.    RESULTS  AFE potently inhibited the activities of  α ‐amylase and  α ‐glucosidase in a concentration‐dependent manner with half maximal inhibitory concentration (IC 50 ) values of 135.70 μg mL −1  and 106.70 μg mL −1  respectively. Furthermore, it also showed inhibition of  α ‐glucosidase (IC 50  562.9 μg mL −1 ) and dipeptidyl peptidase‐4 (DPP‐4; IC 50  3770 μg mL −1 ) enzyme activities. AFE is a potent antioxidant showing a free radical scavenging activity (IC 50  2.37 μg mL −1 ) and protecting against cellular reactive oxygen species (IC 50  1.77 μg mL −1 ), and the effects elicited could be attributed to its phytoconstituents.    CONCLUSION  AFE showed significant gastric acid resistance and was also found to be thermostable against wet heat. Excellent  α ‐amylase,  α ‐glucosidase, and DPP‐4 inhibitory activities of AFE, as well as antioxidant activities, strongly recommend its use for the management of type 2 diabetes mellitus. © 2019 The Authors.  Journal of The Science of Food and Agriculture  published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

journal of the science of food and agriculture

Standardized  Emblica officinalis  fruit extract inhibited the activities of  α ‐amylase,  α ‐glucosidase, and dipeptidyl peptidase‐4 and displayed antioxidant potential