Comparison of glycaemic indices of some local beans (<i>Vigna unguiculata</i> [Linn] Walp varieties) in Nigerians

  • Oluwarotimi Bolaji Olopade Lagos University Teaching Hospital
  • Ifedayo A Odeniyi Lagos university Teaching Hospital
  • Sandra E Iwuala Lagos university Teaching Hospital
  • Oluwatosin O Kayode Lagos University Teaching Hospital
  • Olufemi A Fasanmade Lagos University Teaching Hospital
  • Michael O Ajala General Hospital Island
  • Patricia O Chimah Lagos University Teaching Hospital
  • Augustine E Ohwovoriole Lagos University Teaching Hospital
Keywords: (Vigna unguiculata [Linn] Walp), diabetes mellitus, fibre, glycaemic index, Nigerian

Abstract

Background: Beans are recommended for their richness and for their salutary effect on blood glucose. Inter-species differences impact on blood glucose. What appeared unknown is whether varieties of beans of the same species (Vigna unguiculata [Linn] Walp) have differential effects on blood glucose when equal amounts are consumed. Objective: To perform proximate analysis and compare the glycaemic indices on consumption of Vigna unguiculata (Linn) Walp species. Setting and subjects: This was an experimental study and subjects consisted of 12 healthy consenting participants at Lagos University Teaching Hospital (LUTH) in Lagos, Nigeria. Outcome measure: Fibre contents and the glycaemic indices of Vigna unguiculata (Linn) Walp varieties ‘oloyin’, ‘drum’ and ‘Sokoto’ white. Results: The mean (±SD) crude fibre content of Vigna unguiculata (Linn) Walp varieties ‘oloyin’, ‘drum’ and ‘Sokoto white’ are 2.75% (± 0.00), 2.64% (± 0.14) and 2.94% (± 0.17) respectively. The median (95% CI) glycaemic index (GI) of Vigna unguiculata (Linn) Walp variety ‘oloyin’ was 12.10% (6.0–16.31), variety ‘drum’ 17.64% (9.22–48.93) and variety ‘Sokoto white’ 12.04% (5.54–28.94) respectively. The GI of the bean meals differed significantly (Friedman’s test, χ2 (2) = 6.500, p = 0.039). Conclusion: The fibre content of intra-species beans, together with their GI, differs. ‘Drum’ bean meal has the lowest fibre content and highest glycaemic response. ‘Oloyin’ and ‘Sokoto white’ bean meals are recommended for persons with DM as some beans are more diabetic friendly than others. (Full text available online at www.medpharm.tandfonline.com/oemd) Journal of Endocrinology, Metabolism and Diabetes of South Africa 2017; DOI: 10.1080/16089677.2017.1378461

Author Biographies

Oluwarotimi Bolaji Olopade, Lagos University Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Ifedayo A Odeniyi, Lagos university Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Sandra E Iwuala, Lagos university Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Oluwatosin O Kayode, Lagos University Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Olufemi A Fasanmade, Lagos University Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Michael O Ajala, General Hospital Island
Department of Chemical Pathology General Hospital Lagos Island Lagos
Patricia O Chimah, Lagos University Teaching Hospital
Department of Dietetics Lagos University Teaching Hospital Lagos
Augustine E Ohwovoriole, Lagos University Teaching Hospital
Department of Medicine, Endocrinology, Diabetes & Metabolism Lagos University Teaching Hospital Lagos
Published
2017-12-04
Section
Research Articles