Journal List > J Nutr Health > v.51(1) > 1081557

Park, Chung, Shim, Jang, and Nam: Effects of macronutrients in mixed meals on postprandial glycemic response

Abstract

Purpose

The aim of study was to determine the effects of carbohydrate, fat, protein, and fiber contents on glycemic responses in a single food item or meal.

Methods

Glycemic responses were measured in 30 healthy young adults (17 males and 13 females) with various test foods, including rice, egg whites, bean sprouts, olive oil, noodles, prune, broccoli, Korean dishes, Western dishes, and salad dishes, etc. Test foods were designed to contain various carbohydrate, fat, protein, and fiber contents in single or mixed foods or dishes. After 12 hours of fasting, participants consumed test foods, and the glycemic response was measured for a subsequent 120 min (0, 15, 30, 60, 90, and 120 min). Three hundred and fifty three glycemic responses from 62 foods were collected. The incremental area under the curve (AUC) was calculated for each test food for each subject to examine glycemic responses. Statistical analysis was conducted to identify which macronutrient (carbohydrate, fat, protein and fiber) affected the AUC using a mixed model.

Results

Carbohydrates (β= 37.18, p < 0.0001) significantly increased while fat (β= −32.70, p = 0.0054) and fiber (β= −32.01, p = 0.0486) significantly reduced the glycemic response.

Conclusion

It can be concluded that the glycemic response of a meal can be modified depending on the fat and fiber contents of ingredient foods, even though carbohydrate content is maintained.

Figures and Tables

Fig. 1

Increment of area under the curve (AUC) of serum glucose after a test meal (sorted by carbohydrate, fiber, fat and protein content (g), respectively)

jnh-51-31-g001
Table 1

Macronutrient component of test foods and dishes

jnh-51-31-i001

1) n = subjects' number

Table 2

Characteristics of subjects

jnh-51-31-i002

1) n = number 2) mean ± SD

Table 3

Multivariate regression analysis of area under the curve (AUC) of serum glucose with energy and macronutrients (carbohydrate, protein, fat, fiber)

jnh-51-31-i003

*p < 0.05, **p < 0.01, ***p < 0.001

Model 1: model with macronutrients only

Model 2: model with energy + macronutrients

Notes

This research was supported by a grant from Pulmuone Co.

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