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Does food act physiologically like a 'drug of choice' for some?
Date:7/19/2011

in kg/m2) < 30] and 16 obese (BMI  30) women were randomly assigned to 1 of 2 groups: the "weekly group" participated in weekly experimental food exposure sessions for 5 wk, whereas the "daily group" were studied daily for 5 consecutive days. During each 28-min experimental session, subjects were asked to complete a variety of tasks after which they were "rewarded" by being given a 125-kcal portion of macaroni and cheese. Participants could work for as much food as they wanted. The researchers then evaluated total energy intake.

Whereas weekly food exposure increased total caloric intake by approximately 30 kcal/d, daily exposure decreased energy consumption by ~100 kcal/d. This supports long-term habituation in terms of caloric intake. Very few differences were found between how obese and nonobese individuals responded.

The authors concluded that reducing variety in food choices may represent an important strategy for those trying to lose weight. Moreover, having a person even remember that they have eaten a certain food recently may be effective in this regard. In their accompanying editorial, Avena and Gold compare physiologic components of the food addiction hypothesis to the body's addictive responses to drugs. They also ponder whether school-lunch planners and public health officials should note that diversity in the menu is not necessarily a virtue" but might instead "be associated with promoting excess food intake and increased body mass index." Provocative food for thought.


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Contact: Suzanne Price
sprice@nutrition.org
American Society for Nutrition
Source:Eurekalert

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