Premium
Characterization of Antioxidants and Hypoglycemic Potential of Pomegranate Grown in I ndia: A Preliminary Investigation
Author(s) -
Kaur Charanjit,
Pal R. K.,
Kar Abhijit,
Gadi Chirag,
Sen Sangita,
Kumar Praveen,
Chandra Ram,
Jaiswal Sarika,
Khan Islam
Publication year - 2014
Publication title -
journal of food biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 47
eISSN - 1745-4514
pISSN - 0145-8884
DOI - 10.1111/jfbc.12066
Subject(s) - postprandial , antioxidant , anthocyanin , gallic acid , food science , ascorbic acid , flavonoid , chemistry , biochemistry , biology , microbiology and biotechnology , insulin
Six pomegranate varieties ( M ridula, B hagwa, G anesh, J yoti, G ‐137, K andhari) grown in semiarid regions of I ndia were studied for biochemical parameters including total antioxidant content and antioxidant activities. Total antioxidant activities were evaluated using ferric reducing antioxidant power (5.54–7.67 μmol TE /g), cupric reducing antioxidant power (7.87–16.24 μmol TE /g) and 2, 2‐diphenyl‐1‐picrylhydrazyl (8.98–15.47 μmol TE /g) assays. Hypoglycemic potential was evaluated using α‐glucosidase inhibitory assay and color attributes using L *, a *, b *, hue angle and chroma values. Total phenolics, flavonoid and anthocyanin content range of 87.62–153.62 mg gallic acid equivalent/100 g, 8.54–23.99 mg QE /100g and 6.45–457.99 mg/kg, respectively. Total soluble solid, acidity, pH and ascorbic acid content varied between 15.72 and 18.18 Brix, 0.24 and 0.28%, 2.83 and 3.20, and 3.68 and 13.65 mg/100 g, respectively. However both “ M ridula” and “ B hagwa” had the highest content of total phenolics, flavonoids, total anthocyanin, ascorbic acid, antioxidant activity and hypoglycemic potential. Overall, antioxidant composition of pomegranate, especially total phenolics and total anthocyanin content, could provide an attractive strategy to manage postprandial hyperglycemia. Practical Applications Postprandial hyperglycemia plays an important role in the development of type II diabetes mellitus and complications associated with the disease. The enzyme α‐glucosidase is a key enzyme responsible for the increase in blood glucose level. α‐ G lucosidase inhibitors from natural food sources are an attractive strategy for managing postprandial hyperglycemia. This paper presents the findings of a comprehensive investigation of total antioxidant content and activity in terms of free radical scavenging and reducing capacities of six different pomegranate ( P unica granatum L.) varieties grown in semiarid regions of I ndia. Total anthocyanin and total phenolics content of pomegranate varieties reported in this study make them potential candidates for managing postprandial hyperglycemia related to type II diabetes.