Public release date: 3-Sep-2008
Research findings reveal eating more protein in the morning helps dieters retain fullness throughout the day
Lafayette, Ind. (September 3, 2008) – A new study published online today in the British Journal of Nutrition found that timing of dietary protein intake affects feelings of fullness throughout the day. The study concluded that when people ate high-quality protein foods, from sources such as eggs and lean Canadian bacon, for breakfast they had a greater sense of sustained fullness throughout the day compared to when more protein was eaten at lunch or dinner.i
“There is a growing body of research which supports eating high-quality protein foods when dieting to maintain a sense of fullness,” said Wayne W. Campbell, PhD, study author and professor of Foods and Nutrition at Purdue University. “This study is particularly unique in that it looked at the timing of protein intake and reveals that when you consume more protein may be a critical piece of the equation.”
A Closer Look at the Study
The study included overweight or obese men who ate a reduced calorie diet. The diet consisted of two variations of protein intakes, both which were within federal nutrition recommendations: normal protein intake (11-14 percent of calories) or increased protein (18-25 percent of calories). The researchers tested the effect of consuming the additional protein at specific meals – breakfast, lunch or dinner – or spaced evenly throughout the day.
Purdue researchers found that the feeling of fullness was greatest and most sustained throughout the day when the additional protein, from eggs and lean Canadian bacon, was eaten at breakfast – versus lunch or dinner.
This study adds to a growing body of research on the benefits of eating high-quality protein for weight management. Recent research provides further evidence to support the findings of this study:
A study published online last month in the International Journal of Obesity found that eating two eggs for breakfast, as part of a reduced-calorie diet, helped overweight adults lose more weight and feel more energetic than those who ate a bagel breakfast of equal calories.
A Purdue University study published in a 2007 issue of Obesity, a scientific journal, revealed that a calorie-restricted diet with additional protein resulted in retained post-meal feelings of fullness and improved overall mood. The same study also found that a higher level of protein intake was more effective in maintaining lean body mass during weight loss.