An insulin index of foods

The insulin demand generated by 1000-kJ portions of common foods

Susanne H A Holt, Janette C. Brand Miller, Peter Petocz

    Research output: Contribution to journalArticle

    200 Citations (Scopus)

    Abstract

    The aim of this study was to systematically compare postprandial insulin responses to isoenergetic 1000-kJ (240-kcal) portions of several common foods. Correlations with nutrient content were determined. Thirty-eight foods separated into six food categories (fruit, bakery products, snacks, carbohydrate-rich foods, protein-rich foods, and breakfast cereals) were fed to groups of 11-13 healthy subjects. Finger-prick blood samples were obtained every 15 min over 120 min. An insulin score was calculated from the area under the insulin response curve for each food with use of white bread as the reference food (score = 100%). Significant differences in insulin score were found both within and among the food categories and also among foods containing a similar amount of carbohydrate. Overall, glucose and insulin scores were highly correlated (r = 0.70, P < 0.001, n = 38). However, protein-rich foods and bakery products (rich in fat and refined carbohydrate) elicited insulin responses that were disproportionately higher than their glycemic responses. Total carbohydrate (r = 0.39, P < 0.05, n = 36) and sugar (r = 0.36, P < 0.05, n = 36) contents were positively related to the mean insulin scores, whereas fat (r = -0.27, NS, n = 36) and protein (r = -0.24, NS, n = 38) contents were negatively related. Consideration of insulin scores may be relevant to the dietary management and pathogenesis of non-insulin- dependent diabetes mellitus and hyperlipidemia and may help increase the accuracy of estimating preprandial insulin requirements.

    Original languageEnglish
    Pages (from-to)1264-1276
    Number of pages13
    JournalAmerican Journal of Clinical Nutrition
    Volume66
    Issue number5
    Publication statusPublished - 1997

    Keywords

    • Area under the curve
    • Carbohydrate
    • Diabetic diet
    • Glucose score
    • Glycemic index
    • Humans
    • Hyperlipidemia
    • Insulin
    • Insulin score
    • NIDDM
    • Non-insulin-dependent diabetes mellitus

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