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The effect of portion size on energy intake

from larger portions of food is eaten, regardless of how intense the hunger state at the beginning of the meal was (7, 8). It seems that adults ignore hunger and satiety signals arising from the larger portions. Clinical studies on this question is clear (7, 8):

you offer people great and small servings of macaroni and cheese, they are consuming large portions of 30 percent more calories (1). was served several days in various sizes sandwich for lunch, then the men took of the great sandwiches and 56 percent women 31 percent more calories (2). Despite the different amounts of energy, the participants reported at the end of the meal over a similar state of saturation.

In a canteen serving of the pasta at the same price was increased by 50 percent. This led to a higher energy intake by 43 percent (3).

In another study examined whether a larger snack (snack-size: +50%) to a reduced uptake in the subsequent meal out. Although 37% of men and the women ate 18% more of the offered snack, did not lead to reduced food intake at the next meal (4). An increased uptake by larger portions in one day was not compensated by a lower intake the next day (5). Over longer periods (4 weeks) is not caused by large portions receiving more compensation (6, 8).

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The portion size will be chosen individually, is usually relatively constant. It is the result of repeated trial and error ": the hunger was satisfied enough with this food? Was the amount sufficient until the next meal to keep enough? Was that uncomfortable feeling of fullness after the meal?

When persons regularly offered large portions (eg in restaurant), thus increasing the long run be freely chosen, individual portion size (6).

One survey found that 69 percent eat the restaurant's guests are offered portions to complete. Of these people but 30 percent would have been content with a smaller portion (7).

Conclusion: The offered portion size influenced very much the power consumption.

Link - another contribution on the influence of portion size on the saturation

This might interest you:

saturation index - Are there any particularly satisfying foods?
Strong saturation by slowly eating

influence of energy density on the saturation

think away appetite, insatiable desire to resist

A protein-rich meal has a high saturation effect

Are there natural ingredients that affect the saturation positive?

Is there a connection between vitamin C status and saturation?

Die Wirkung von Chrom auf die Nahrungsaufnahme und das Sättigungsgefühl

Literatur:

Rolls BJ, Morris EL, Roe LS. Portion size of food affects energy intake in normal-weight and overweight men and women. Am J Clin Nutr. 2002 Dec;76(6):1207-13.

Rolls BJ, Roe LS, Meengs JS, Wall DE. Increasing the portion size of a sandwich increases energy intake. J Am Diet Assoc. 2004 Mar;104(3):367-72.

Diliberti N, Bordi PL, Conklin MT, Roe LS, Rolls BJ. Increased portion size leads to increased energy intake in a restaurant meal. Obes Res. 2004 Mar;12(3):562-8.
Rolls BJ, Roe LS, Kral TV, Meengs JS, Wall DE. Increasing the portion size of a packaged snack increases energy intake in men and women. Appetite. 2004 Feb;42(1):63-9.

Rolls BJ, Roe LS, Meengs JS. Larger portion sizes lead to a sustained increase in energy intake over 2 days. J Am Diet Assoc. 2006 Apr;106(4):543-9.

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Saturday, March 13, 2010