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Pakistan Journal of Nutrition
  Year: 2016 | Volume: 15 | Issue: 7 | Page No.: 649-654
DOI: 10.3923/pjn.2016.649.654
Changes in Resistant Starch Content and Glycemic Index of Pre-Gelatinized Gayam (Inocarfus fagifer Forst.) Flour
A. Wijanarka, T. Sudargo, E. Harmayani and Y. Marsono

Abstract:
Gayam seed (Inocarfus fagifer Forst.) has a high amylose content and is a good source of resistant starch (RS). Pre-gelatinization during the preparation of gayam flour can increase the RS content, which is associated with a lower glycemic index (GI). The objective of this research was to study the changes in both the RS content and GI of gayam flour with pre-gelatinization treatment. Pre-gelatinized gayam flour was prepared from unpeeled gayam seed that was boiled at 100°C for 15, 30, or 45 min. The results showed that the RS contents of pre-gelatinized gayam flour (by dry weight analysis) boiled for 0, 15, 30 and 45 min were 15.78±0.99, 16.95±0.54, 17.06±1.10 and 17.92±0.39%, respectively. The RS content of pre-gelatinized gayam flour boiled for 15 and 30 min did not differ significantly compared with the control, whereas pre-gelatinization for 45 min produced the highest RS content. Using glucose as the reference food, the GI values of pre-gelatinized gayam flour boiled for 0, 15, 30 and 45 min were 74, 75, 61 and 57, respectively. Thus, a longer pre-gelatinization time can produce a lower GI value for gayam flour, which is associated with an increased RS content.
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How to cite this article:

A. Wijanarka, T. Sudargo, E. Harmayani and Y. Marsono, 2016. Changes in Resistant Starch Content and Glycemic Index of Pre-Gelatinized Gayam (Inocarfus fagifer Forst.) Flour. Pakistan Journal of Nutrition, 15: 649-654.

DOI: 10.3923/pjn.2016.649.654

URL: https://scialert.net/abstract/?doi=pjn.2016.649.654

 
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