Most of the public debate about diet continues to focus on the extremes of very high (Atkins' Plan) or very low (Ornish Plan) levels of proteins. Layman's plan falls within the protein range recently recommended by the National Academy of Sciences Food and Nutrition Board. The USDA Food Guide Pyramid falls at the low end of the accepted protein range.
In Layman's study, both diet groups lost a similar amount of weight, about 16 pounds, but the study group lost more body fat and less muscle mass than the control group. Those who followed the moderately high protein diet lost two pounds more of body fat, yet maintained one pound more muscle mass than the control group.
The study challenges the conventional wisdom about the role of low-fat foods in weight loss, Layman said.
"Traditionally, people have built a diet around low-fat foods, instead of high quality protein foods. Study participants following the moderately high protein plan, which I call the 'Sensible Solution,' were twice as effective in maintaining lean muscle mass," he said. "Muscle helps burn calories, but is often compromised during weight loss."
Nutrition experts have long debated the virtues of many of the high protein diets because of conventional concerns related to the consumption of saturated fat and cholesterol. However, Layman said, the opposite was true in his study. "The group following my diet lost fat, maintained muscle and had an improvement in total blood cholesterol level. Subjects found the eating plan easy to follow, allowing them to enjoy foods from all food groups."
Additional findings showed that women in the study group were less hungry between meals than were those following the traditional diet. The study group also experienced more stable blood glucose levels and reduced insulin response following meals. Both groups had reductions in total blood cholesterol, but the study group also had decreased triglyceride levels.
Layman plans a long-term study of his "Sensible Solution" diet to further investigate the role of leucine in metabolic control.
From Richard Gayles's Blog
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