title: The ingredients in Saengshik, a formulated health food, inhibited the activity of α-amylase and α-glucosidase as anti-diabetic function.
abstract: OBJECTIVE
  We investigated total 26 ingredients of Saengshik which will be commercially produced as an anti-diabetic dietary supplement.
  
  
  METHODS
  Thirteen vegetables, nine cereals, three legumes and one seed were extracted with aqueous ethanol for 2 h at 60℃, and evaluated for their inhibitory effects against α-amylase and α-glucosidase and for total phenolic and flavonoid contents.
  
  
  RESULTS
  All ingredients inhibited α-amylase activity except cabbage. Strong inhibitory activity of α-amylase was observed in leek, black rice, angelica and barley compared with acarbose as a positive control. Stronger inhibition of α-glucosidase activity was found in small water dropwort, radish leaves, sorghum and cabbage than acarbose. All Saengshik ingredients suppressed α-glucosidase activity in the range of 0.3-60.5%. Most ingredients contained total phenols which were in the range of 1.2-229.4 mg gallic acid equivalent/g dried extract. But, total phenolic contents were not observed in carrot, pumpkin and radish. All ingredients contained flavonoid in the range of 11.6-380.7 mg catechin equivalent/g dried extract.
  
  
  CONCLUSIONS
  Our results demonstrate that Saengshik containing these ingredients would be an effective dietary supplement for diabetes.
authors.affiliation: Department of Food Science and Nutrition, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea. ; Institute of Global Food Industry, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea.
authors.forename: Misook
authors.initials: M
authors.lastname: Kim
authors.affiliation: Department of Food Science and Nutrition, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea.
authors.forename: Eunji
authors.initials: E
authors.lastname: Kim
authors.affiliation: Department of Food Science and Nutrition, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea. ; Institute of Global Food Industry, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea.
authors.forename: Han Sub
authors.initials: HS
authors.lastname: Kwak
authors.affiliation: Department of Food Science and Nutrition, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea. ; Institute of Global Food Industry, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea.
authors.forename: Yoonhwa
authors.initials: Y
authors.lastname: Jeong
keywords: Saengshik; antioxidant activity; total phenolic compounds; α-amylase inhibition; α-glucosidase inhibition