Elsevier

Nutrition Research

Volume 16, Issue 3, March 1996, Pages 381-384
Nutrition Research

Human study
Time of day influences relative glycaemic effect of foods

https://doi.org/10.1016/0271-5317(96)00019-XGet rights and content

Abstract

To see if time of day affected the relative glycaemic effect of foods, we studied 8 non-diabetic subjects in random order on 4 days over a 2-week period. They were given 50g carbohydrate portions of corn or oat-psyllium cereal plus 200ml 2% milk. Each test meal was taken either at 08:00h after a 10–12h overnight fast, or at 12:00h, 3.5h after a standard breakfast. The incremental area under the glycaemic response curve for corn cereal taken at breakfast was greater than that at lunch, 103±13 versus 52±6 mmol·min/L (p<0.01), with the respective values for oat cereal being 52±12 and 41±11 mmol·min/L (ns). The response to the oat cereal was 50% less than that of the corn cereal (p<0.01) when taken at breakfast, but the difference at lunch, 21%, was not statistically significant. Thus, time of day may influence the absolute and relative glycaemic responses to foods in non-diabetic subjects. Further studies are needed to see if the same occurs in persons with diabetes.

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