Increasing the Protein Content of Meals and Its Effect on Daily Energy Intake

Alexandria D. Blatt, Liane S. Roe, Barbara J. Rolls

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

High-protein preloads have been shown to enhance satiety, but little is known about the satiating effects of protein in more typical situations when meals are consumed ad libitum. To investigate the effects of protein in amounts commonly consumed over a day, a crossover study was conducted in 2008. In this experiment, 18 normal-weight women consumed ad libitum lunch and dinner entrées 1 day a week that were covertly varied in protein content (10%, 15%, 20%, 25%, or 30% energy). Entrées were manipulated by substituting animal protein for starchy ingredients and were matched for energy density, fat content, palatability, and appearance. Unmanipulated breakfasts and evening snacks were consumed ad libitum. Participants rated their hunger and fullness before and after meals as well as the taste and appearance of entrées. Data were analyzed using a mixed linear model. Results showed that mean 24-hour protein intake increased significantly across conditions, from 44±2 g/day in the 10% protein condition to 82±6 g/day in the 30% condition. Daily energy intake did not differ significantly across the 10% to 30% protein conditions (means 1,870±93, 1,887±93, 1,848±111, 1,876±100, and 1,807±98 kcal in the 10%, 15%, 20%, 25%, and 30% energy groups, respectively). There were no significant differences in hunger and fullness ratings across conditions or in taste and appearance ratings of the manipulated entrées. This study showed that varying the protein content of several entrées consumed ad libitum did not differentially influence daily energy intake or affect ratings of satiety.

Original languageEnglish (US)
Pages (from-to)290-294
Number of pages5
JournalJournal of the American Dietetic Association
Volume111
Issue number2
DOIs
StatePublished - Feb 1 2011

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meals (menu)
Energy Intake
Meals
energy intake
protein content
hunger
satiety
Proteins
proteins
Hunger
dinner
lunch
breakfast
energy density
animal proteins
energy
snacks
palatability
protein intake
ingredients

All Science Journal Classification (ASJC) codes

  • Food Science
  • Nutrition and Dietetics

Cite this

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title = "Increasing the Protein Content of Meals and Its Effect on Daily Energy Intake",
abstract = "High-protein preloads have been shown to enhance satiety, but little is known about the satiating effects of protein in more typical situations when meals are consumed ad libitum. To investigate the effects of protein in amounts commonly consumed over a day, a crossover study was conducted in 2008. In this experiment, 18 normal-weight women consumed ad libitum lunch and dinner entr{\'e}es 1 day a week that were covertly varied in protein content (10{\%}, 15{\%}, 20{\%}, 25{\%}, or 30{\%} energy). Entr{\'e}es were manipulated by substituting animal protein for starchy ingredients and were matched for energy density, fat content, palatability, and appearance. Unmanipulated breakfasts and evening snacks were consumed ad libitum. Participants rated their hunger and fullness before and after meals as well as the taste and appearance of entr{\'e}es. Data were analyzed using a mixed linear model. Results showed that mean 24-hour protein intake increased significantly across conditions, from 44±2 g/day in the 10{\%} protein condition to 82±6 g/day in the 30{\%} condition. Daily energy intake did not differ significantly across the 10{\%} to 30{\%} protein conditions (means 1,870±93, 1,887±93, 1,848±111, 1,876±100, and 1,807±98 kcal in the 10{\%}, 15{\%}, 20{\%}, 25{\%}, and 30{\%} energy groups, respectively). There were no significant differences in hunger and fullness ratings across conditions or in taste and appearance ratings of the manipulated entr{\'e}es. This study showed that varying the protein content of several entr{\'e}es consumed ad libitum did not differentially influence daily energy intake or affect ratings of satiety.",
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Increasing the Protein Content of Meals and Its Effect on Daily Energy Intake. / Blatt, Alexandria D.; Roe, Liane S.; Rolls, Barbara J.

In: Journal of the American Dietetic Association, Vol. 111, No. 2, 01.02.2011, p. 290-294.

Research output: Contribution to journalArticle

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