RS content and EGI value of cooked noodles (I): effect of cooking methods

Yu Tian, Ming Li, Aoxing Tang, Jay Lin Jane, Sushil Dhital, Boli Guo

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

Noodles are widely consumed in China, which can be cooked in different ways. The effects of different cooking methods (boiling, steaming, microwave heating, stir-frying and frying) on the resistance starch (RS) content and digestive properties (digestion rate, digestibility and estimated glycemic index (eGI) value) of noodles were investigated. The RS content was greatly affected by the cooking time, and it was varied when the noodles were optimally cooked using different cooking methods. The RS contents of the microwaved and stir-fried noodles were relatively high (0.59%–0.99%), but it was lower (0.43%–0.44%) in the boiled and steamed noodles. Microwaved noodles showed the slowest digestion rate and the lowest eGI. Due to the limited water within fried noodles, none RS was found in the fried noodles, whereas stir-fried noodles showed RS5 formation from the XRD and DSC results. Compared with boiled and steamed noodles, the microwaved noodles showed a more compact morphology without porous holes on the surface, whereas fried noodles showed irregular morphology. The results indicated that the digestive properties of noodles made with the same ingredients can be greatly altered by using different cooking methods, and the digestive properties of different cooked noodles are worthy of confirmation using in vivo analysis.

Original languageEnglish
Article number328
Number of pages15
JournalFoods
Volume9
Issue number3
DOIs
Publication statusPublished - Mar 2020

Keywords

  • Cooking methods
  • In vitro digestion
  • Noodles
  • Resistant starch

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