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STUDY: 3 square meals a day paired with lean protein help people feel full during weight loss
Date:3/31/2011

t more meat and are not studied as often as women. Twenty-seven obese and overweight men were divided into a high-protein group and a normal-protein group. They all consumed a calorie-restricted diet for 12 weeks - which was 750 calories less than their normal diet - an average of about 2,400 calories per person. The amount of protein varied between each group.

The normal-protein diet was composed of 14 percent of energy from protein, 60 percent from carbohydrate and 26 percent from fat, and the high-protein diet had the same amount of fat but 25 percent of energy from protein and 49 percent from carbohydrate.

For example, the normal-protein group's main sources of protein at a breakfast would be sausage made from vegetable proteins. In comparison, the main source for the high-protein group would be sausage, also made from vegetable proteins, as well as an egg substitute and Canadian bacon. The high-protein diet specifically included 25 percent of total protein intake from pork and 15 percent from egg products. Both sources helped contribute the amino acids and nutrients people need daily, Campbell said. This amount of protein for the high-protein group was estimated at 200 calories per meal.

Another difference between the groups is that the normal-protein diet did not include proteins from flesh foods such as meat.

Beans, legumes and soy products also are high sources of protein, but they are not as prevalent in Americans' diets as dairy and meat products, Campbell said. About 40 percent of the protein Americans consume comes from meat products such as pork, chicken, beef and fish, and another 5 percent comes from eggs and egg products.

"The studies have not been done to show the superiority of these proteins with comparable quantities consumed," he said. "What our studies are showing is that by increasing protein in the diet with these food products, the benefits of higher protein intake are noticeable."

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Contact: Amy Patterson Neubert
apatterson@purdue.edu
765-494-9723
Purdue University
Source:Eurekalert

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