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Chemical composition and in vitro starch digestibility of corn tortillas with added amaranth flour

Islas-Hernández, José Juan ; Rendón-Villalobos, J. Rodolfo ; Agama-Acevedo, Edith ; Tovar, Juscelino LU orcid and Bello-Pérez, Luis A. (2007) In Journal of the Science of Food and Agriculture 87(12). p.2348-2352
Abstract

BACKGROUND: Corn tortillas containing 20% (w/w) amaranth flour (AF) were kept in cold storage and analysed after various times for chemical composition and in vitro starch digestibility, including predicted glycemic index. Comparison was made with traditional nixtamalised corn flour (NCF) tortillas. RESULTS: Lipid and protein contents were higher in mixed NCF/AF tortilla than in NCF tortilla. Available starch (AS) content was lower in NCF/AF tortilla and decreased during cold storage. However, this decrease was greater in NCF tortilla, suggesting slower starch retrogradation in NCF/AF tortilla. After 96 h of storage, total resistant starch (RS) content was higher in NCF tortilla than in NCF/AF tortilla. However, no differences were... (More)

BACKGROUND: Corn tortillas containing 20% (w/w) amaranth flour (AF) were kept in cold storage and analysed after various times for chemical composition and in vitro starch digestibility, including predicted glycemic index. Comparison was made with traditional nixtamalised corn flour (NCF) tortillas. RESULTS: Lipid and protein contents were higher in mixed NCF/AF tortilla than in NCF tortilla. Available starch (AS) content was lower in NCF/AF tortilla and decreased during cold storage. However, this decrease was greater in NCF tortilla, suggesting slower starch retrogradation in NCF/AF tortilla. After 96 h of storage, total resistant starch (RS) content was higher in NCF tortilla than in NCF/AF tortilla. However, no differences were detected thereafter, indicating similar retrogradation after long storage times. Retrograded resistant starch contents indicated that only part of the total RS in tortilla is due to retrogradation, which agrees with the tendency recorded for AS and RS in both types of tortilla. α-Amylolysis rates were similar in NCF/AF and NCF tortillas, decreasing with storage. The predicted glycemic index was always higher in NCF/AF tortilla, a pattern that might be due to the waxy-type starch present in AF. CONCLUSION: NCF/AF tortilla might be suitable as a product with higher protein content and higher glycemic index than conventional NCF tortilla.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Amaranth, Glycemic index, Retrogradation, Starch digestibility, Tortilla
in
Journal of the Science of Food and Agriculture
volume
87
issue
12
pages
5 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:34548312576
ISSN
0022-5142
DOI
10.1002/jsfa.3012
language
English
LU publication?
no
id
a6b34e8f-feb6-4485-8c98-d152ea098b06
date added to LUP
2018-10-05 15:38:56
date last changed
2024-03-22 08:26:03
@article{a6b34e8f-feb6-4485-8c98-d152ea098b06,
  abstract     = {{<p>BACKGROUND: Corn tortillas containing 20% (w/w) amaranth flour (AF) were kept in cold storage and analysed after various times for chemical composition and in vitro starch digestibility, including predicted glycemic index. Comparison was made with traditional nixtamalised corn flour (NCF) tortillas. RESULTS: Lipid and protein contents were higher in mixed NCF/AF tortilla than in NCF tortilla. Available starch (AS) content was lower in NCF/AF tortilla and decreased during cold storage. However, this decrease was greater in NCF tortilla, suggesting slower starch retrogradation in NCF/AF tortilla. After 96 h of storage, total resistant starch (RS) content was higher in NCF tortilla than in NCF/AF tortilla. However, no differences were detected thereafter, indicating similar retrogradation after long storage times. Retrograded resistant starch contents indicated that only part of the total RS in tortilla is due to retrogradation, which agrees with the tendency recorded for AS and RS in both types of tortilla. α-Amylolysis rates were similar in NCF/AF and NCF tortillas, decreasing with storage. The predicted glycemic index was always higher in NCF/AF tortilla, a pattern that might be due to the waxy-type starch present in AF. CONCLUSION: NCF/AF tortilla might be suitable as a product with higher protein content and higher glycemic index than conventional NCF tortilla.</p>}},
  author       = {{Islas-Hernández, José Juan and Rendón-Villalobos, J. Rodolfo and Agama-Acevedo, Edith and Tovar, Juscelino and Bello-Pérez, Luis A.}},
  issn         = {{0022-5142}},
  keywords     = {{Amaranth; Glycemic index; Retrogradation; Starch digestibility; Tortilla}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{12}},
  pages        = {{2348--2352}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Journal of the Science of Food and Agriculture}},
  title        = {{Chemical composition and in vitro starch digestibility of corn tortillas with added amaranth flour}},
  url          = {{http://dx.doi.org/10.1002/jsfa.3012}},
  doi          = {{10.1002/jsfa.3012}},
  volume       = {{87}},
  year         = {{2007}},
}