Bean and rice meals reduce postprandial glycemic response in adults with type 2 diabetes: a cross-over study

Nutr J. 2012 Apr 11;11:23. doi: 10.1186/1475-2891-11-23.

Abstract

Background: Around the world, beans and rice are commonly consumed together as a meal. With type 2 diabetes increasing, the effect of this traditional diet pattern on glycemic response has not been studied fully.

Methods: We evaluated the glycemic response of bean and rice traditional meals compared to rice alone in adults with type 2 diabetes. Seventeen men and women with type 2 diabetes controlled by metformin (n = 14) or diet/exercise (n = 3) aged 35-70 years participated in the randomized 4 × 4 crossover trial. The white long grain rice control, pinto beans/rice, black beans/rice, red kidney beans/rice test meals, matched for 50 grams of available carbohydrate, were consumed at breakfast after a 12 hour fast. Capillary blood glucose concentrations at baseline and at 30 minute intervals up to 180 minutes postprandial were collected. MANOVA for repeated measures established glucose differences between treatments. Paired t tests identified differences between bean types and the rice control following a significant MANOVA.

Results: Postprandial net glucose values were significantly lower for the three bean/rice treatments in contrast to the rice control at 90, 120 and 150 minutes. Incremental area under the curve values were significantly lower for the pinto and black bean/rice meals compared to rice alone, but not for kidney beans.

Conclusions: Pinto, dark red kidney and black beans with rice attenuate the glycemic response compared to rice alone. Promotion of traditional foods may provide non-pharmaceutical management of type 2 diabetes and improve dietary adherence with cultural groups.

Trial registration: ClinicalTrials.gov NCT01241253.

Publication types

  • Clinical Trial
  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Blood Glucose / analysis
  • Breakfast*
  • Combined Modality Therapy
  • Cross-Over Studies
  • Diabetes Mellitus, Type 2 / blood
  • Diabetes Mellitus, Type 2 / diet therapy*
  • Diabetes Mellitus, Type 2 / drug therapy
  • Diabetes Mellitus, Type 2 / therapy
  • Exercise
  • Female
  • Glycemic Index
  • Humans
  • Hyperglycemia / prevention & control*
  • Hypoglycemic Agents / therapeutic use
  • Male
  • Metformin / therapeutic use
  • Middle Aged
  • Oryza / chemistry*
  • Phaseolus / chemistry*
  • Postprandial Period
  • Seeds / chemistry*

Substances

  • Blood Glucose
  • Hypoglycemic Agents
  • Metformin

Associated data

  • ClinicalTrials.gov/NCT01241253