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So Many Brands and Varieties to Choose from: Does This Compromise the Control of Food Intake in Humans?

Hardman CA, Ferriday D, Kyle L, Rogers PJ, Brunstrom JM - PLoS ONE (2015)

Bottom Line: We reasoned that dietary variability might generate uncertainty about the postingestive effects of a food.In a follow-up study (n= 66; 65% female), high pizza variability was associated with i) poorer compensation for calories in pepperoni pizza and ii) lower expected satiation for pepperoni pizza.Furthermore, the effect of uncertainty on caloric compensation was moderated by individual differences in decision making (loss aversion).

View Article: PubMed Central - PubMed

Affiliation: Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom.

ABSTRACT
The recent rise in obesity is widely attributed to changes in the dietary environment (e.g., increased availability of energy-dense foods and larger portion sizes). However, a critical feature of our "obesogenic environment" may have been overlooked - the dramatic increase in "dietary variability" (the tendency for specific mass-produced foods to be available in numerous varieties that differ in energy content). In this study we tested the hypothesis that dietary variability compromises the control of food intake in humans. Specifically, we examined the effects of dietary variability in pepperoni pizza on two key outcome variables; i) compensation for calories in pepperoni pizza and ii) expectations about the satiating properties of pepperoni pizza (expected satiation). We reasoned that dietary variability might generate uncertainty about the postingestive effects of a food. An internet-based questionnaire was completed by 199 adults. This revealed substantial variation in exposure to different varieties of pepperoni pizza. In a follow-up study (n= 66; 65% female), high pizza variability was associated with i) poorer compensation for calories in pepperoni pizza and ii) lower expected satiation for pepperoni pizza. Furthermore, the effect of uncertainty on caloric compensation was moderated by individual differences in decision making (loss aversion). For the first time, these findings highlight a process by which dietary variability may compromise food-intake control in humans. This is important because it exposes a new feature of Western diets (processed foods in particular) that might contribute to overeating and obesity.

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Related in: MedlinePlus

Scatterplot and linear best fit to show the association of pizza variability with expected satiation.Values for pizza variability are standardized residuals adjusted for pizza energy content and loss aversion.
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pone.0125869.g006: Scatterplot and linear best fit to show the association of pizza variability with expected satiation.Values for pizza variability are standardized residuals adjusted for pizza energy content and loss aversion.

Mentions: The primary regression model accounted for 12% of the variance in expected satiation, F(3, 59) = 2.5, p = .07. Pizza variability was a significant negative predictor of expected satiation (Beta = -.28, t = -2.2, p = .03) (Fig 6). Neither pizza energy content nor loss aversion were significant predictors of expected satiation (Beta = -.09, t = -0.72, p = .47, and Beta = -.16, t = -1.2, p = .22, respectively).


So Many Brands and Varieties to Choose from: Does This Compromise the Control of Food Intake in Humans?

Hardman CA, Ferriday D, Kyle L, Rogers PJ, Brunstrom JM - PLoS ONE (2015)

Scatterplot and linear best fit to show the association of pizza variability with expected satiation.Values for pizza variability are standardized residuals adjusted for pizza energy content and loss aversion.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4414581&req=5

pone.0125869.g006: Scatterplot and linear best fit to show the association of pizza variability with expected satiation.Values for pizza variability are standardized residuals adjusted for pizza energy content and loss aversion.
Mentions: The primary regression model accounted for 12% of the variance in expected satiation, F(3, 59) = 2.5, p = .07. Pizza variability was a significant negative predictor of expected satiation (Beta = -.28, t = -2.2, p = .03) (Fig 6). Neither pizza energy content nor loss aversion were significant predictors of expected satiation (Beta = -.09, t = -0.72, p = .47, and Beta = -.16, t = -1.2, p = .22, respectively).

Bottom Line: We reasoned that dietary variability might generate uncertainty about the postingestive effects of a food.In a follow-up study (n= 66; 65% female), high pizza variability was associated with i) poorer compensation for calories in pepperoni pizza and ii) lower expected satiation for pepperoni pizza.Furthermore, the effect of uncertainty on caloric compensation was moderated by individual differences in decision making (loss aversion).

View Article: PubMed Central - PubMed

Affiliation: Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom.

ABSTRACT
The recent rise in obesity is widely attributed to changes in the dietary environment (e.g., increased availability of energy-dense foods and larger portion sizes). However, a critical feature of our "obesogenic environment" may have been overlooked - the dramatic increase in "dietary variability" (the tendency for specific mass-produced foods to be available in numerous varieties that differ in energy content). In this study we tested the hypothesis that dietary variability compromises the control of food intake in humans. Specifically, we examined the effects of dietary variability in pepperoni pizza on two key outcome variables; i) compensation for calories in pepperoni pizza and ii) expectations about the satiating properties of pepperoni pizza (expected satiation). We reasoned that dietary variability might generate uncertainty about the postingestive effects of a food. An internet-based questionnaire was completed by 199 adults. This revealed substantial variation in exposure to different varieties of pepperoni pizza. In a follow-up study (n= 66; 65% female), high pizza variability was associated with i) poorer compensation for calories in pepperoni pizza and ii) lower expected satiation for pepperoni pizza. Furthermore, the effect of uncertainty on caloric compensation was moderated by individual differences in decision making (loss aversion). For the first time, these findings highlight a process by which dietary variability may compromise food-intake control in humans. This is important because it exposes a new feature of Western diets (processed foods in particular) that might contribute to overeating and obesity.

Show MeSH
Related in: MedlinePlus