A transgressive brown rice mediates favourable glycaemic and insulin responses

Tilakavati Karupaiah, Chuah Khun Aik, Tan Choon Heen, Satiapoorany Subramaniam, Atiqur R. Bhuiyan, Parviz Fasahat, Abdullah M. Zain, R Wickneswari V Ratnam

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Background: We evaluated glycaemic response of a brown rice variant (BR) developed by cross-breeding. Subjects (n = 9) consumed 50 g carbohydrate equivalents of BR, white rice (WR) and the polished brown rice (PR) in comparison to 50 g glucose reference (GLU) in a cross-over design. Plasma glucose and insulin at 0, 15, 45, 60, 90, 120 and 180 min were measured and incremental area under the curve (IAUC) and indices for glucose (GI) and insulin (II) calculated. Results: BR compared to PR or WR produced the lowest postprandial glycaemia (GI: 51 vs 79 vs 86) and insulinaemia (II: 39 vs 63 vs 68) irrespective of amylose content (19 vs 23 vs 26.5%). Only BR was significantly different from GLU for both plasma glucose (P = 0.012) and insulin (P = 0.013) as well as IAUC glu (P = 0.045) and IAUC ins (P = 0.031). Glycaemic and insulinaemic responses correlated positively (r = 0.550, P < 0.001). Linear trends for IAUC glu and IAUC ins indicated a greater secretion of insulin tied in with a greater glycaemic response for WR (r 2 = 0.848), moderate for PR (r 2 = 0.302) and weakest for BR (r 2 = 0.122). Conclusion: The brown rice variant had the lowest GI and II values but these advantages were lost with polishing.

Original languageEnglish
Pages (from-to)1951-1956
Number of pages6
JournalJournal of the Science of Food and Agriculture
Volume91
Issue number11
DOIs
Publication statusPublished - 30 Aug 2011

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brown rice
insulin
Insulin
Area Under Curve
glucose
Glucose
rice
Oryza
hyperinsulinemia
correlated responses
insulin secretion
amylose
Amylose
blood glucose
Cross-Over Studies
carbohydrates
Breeding
Carbohydrates

Keywords

  • Amylose
  • Brown rice
  • GI
  • Glucose
  • II
  • Insulin

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Food Science
  • Nutrition and Dietetics
  • Biotechnology

Cite this

A transgressive brown rice mediates favourable glycaemic and insulin responses. / Karupaiah, Tilakavati; Aik, Chuah Khun; Heen, Tan Choon; Subramaniam, Satiapoorany; Bhuiyan, Atiqur R.; Fasahat, Parviz; Zain, Abdullah M.; V Ratnam, R Wickneswari.

In: Journal of the Science of Food and Agriculture, Vol. 91, No. 11, 30.08.2011, p. 1951-1956.

Research output: Contribution to journalArticle

Karupaiah, Tilakavati ; Aik, Chuah Khun ; Heen, Tan Choon ; Subramaniam, Satiapoorany ; Bhuiyan, Atiqur R. ; Fasahat, Parviz ; Zain, Abdullah M. ; V Ratnam, R Wickneswari. / A transgressive brown rice mediates favourable glycaemic and insulin responses. In: Journal of the Science of Food and Agriculture. 2011 ; Vol. 91, No. 11. pp. 1951-1956.
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AU - Bhuiyan, Atiqur R.

AU - Fasahat, Parviz

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AB - Background: We evaluated glycaemic response of a brown rice variant (BR) developed by cross-breeding. Subjects (n = 9) consumed 50 g carbohydrate equivalents of BR, white rice (WR) and the polished brown rice (PR) in comparison to 50 g glucose reference (GLU) in a cross-over design. Plasma glucose and insulin at 0, 15, 45, 60, 90, 120 and 180 min were measured and incremental area under the curve (IAUC) and indices for glucose (GI) and insulin (II) calculated. Results: BR compared to PR or WR produced the lowest postprandial glycaemia (GI: 51 vs 79 vs 86) and insulinaemia (II: 39 vs 63 vs 68) irrespective of amylose content (19 vs 23 vs 26.5%). Only BR was significantly different from GLU for both plasma glucose (P = 0.012) and insulin (P = 0.013) as well as IAUC glu (P = 0.045) and IAUC ins (P = 0.031). Glycaemic and insulinaemic responses correlated positively (r = 0.550, P < 0.001). Linear trends for IAUC glu and IAUC ins indicated a greater secretion of insulin tied in with a greater glycaemic response for WR (r 2 = 0.848), moderate for PR (r 2 = 0.302) and weakest for BR (r 2 = 0.122). Conclusion: The brown rice variant had the lowest GI and II values but these advantages were lost with polishing.

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