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  • Title: Glycemic and insulinemic responses as determinants of appetite in humans.
    Author: Flint A, Møller BK, Raben A, Sloth B, Pedersen D, Tetens I, Holst JJ, Astrup A.
    Journal: Am J Clin Nutr; 2006 Dec; 84(6):1365-73. PubMed ID: 17158418.
    Abstract:
    BACKGROUND: The importance of the postprandial glycemic and insulinemic responses for appetite and energy intake (EI) is controversial. OBJECTIVE: The aim of the study was to test the hypothesis that postprandial appetite sensations and subsequent EI are determined by postprandial glycemic and insulinemic responses after the intake of a range of breakfast meals. DESIGN: The study was a randomized, crossover meal test including 28 healthy young men, each of whom tested 10 of 14 breakfast meals. Each meal contained 50 g carbohydrate with various glycemic index and energy and macronutrient contents. Blood samples were taken, and appetite sensations were measured 3 h after the meals. Subsequently, EI at lunch (EI(lunch)) was recorded. RESULTS: The glycemic response was unrelated to appetite sensations, whereas the insulinemic response was positively associated with postprandial fullness (R2 = 0.33, P < 0.05). In contrast, the insulinemic response was unrelated to the subsequent EI(lunch), whereas the glycemic response was positively associated with EI(lunch) (R2 = 0.33, P < 0.05). Although no significant difference in EI(lunch) was observed between different breakfast conditions, a low breakfast EI was associated with a high EI(lunch) (R2 = 0.60, P < 0.001). CONCLUSIONS: The current study does not support the contention that the postprandial glycemic response has an important effect on short-term appetite sensations, but a low-glycemic index meal may reduce subsequent EI. In contrast, postprandial insulin seems to affect short-term appetite sensations.
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