Enrico a écrit:Je vais verifier ce que c'est un polymere de glucose et je reviens.
Elderewen a écrit:C'est comme pour les protéines, au-délà de 3g/kg/j, ça n'est potentiellement pas très bon pour le rein et le foie...
Elderewen a écrit:C'est comme pour les protéines, au-délà de 3g/kg/j, ça n'est potentiellement pas très bon pour le rein et le foie...
Elderewen a écrit:Vive la pondération !
Abstract
High-protein diets have recently been proposed as a “new” trategy for successful weight loss. However, variations of these diets have been popular since the 1960s. High-protein diets typically offer wide latitude in protein food choices, are restrictive in other food choices (mainly carbohydrates), and provide structured eating plans. They also often promote misconceptions about carbohydrates, insulin resistance, ketosis, and fat burning as mechanisms of action for weight loss. Although these diets may not be harmful for most healthy people for a short period of time, there are no long-term scientific studies to support their overall efficacy and safety. These diets are generally associated with higher intakes of total fat, saturated fat, and cholesterol because the protein is provided mainly by animal sources. In high-protein diets, weight loss is initially high due to fluid loss related to reduced carbohydrate intake, overall caloric restriction, and ketosis-induced appetite suppression. Beneficial effects on blood lipids and insulin resistance are due to the weight loss, not to the change in caloric composition. Promoters of high-protein diets promise successful results by encouraging high-protein food choices that are usually restricted in other diets, thus providing initial palatability, an attractive alternative to other weight-reduction diets that have not worked for a variety of reasons for most individuals. High-protein diets are not recommended because they restrict healthful foods that provide essential nutrients and do not provide the variety of foods needed to adequately meet nutritional needs. Individuals who follow these diets are therefore at risk for compromised vitamin and mineral intake, as well as potential cardiac, renal, bone, and liver abnormalities overall.
(Circulation. 2001;104:1869-1874.)
Summary
Scientific studies do not demonstrate that high-protein diets without concomitant decreases in caloric intake result in sustained weight loss or improved health. Most Americans consume more protein than their bodies need. Extra protein is not used efficiently by the body and may impose a metabolic burden on the kidneys and liver. High-protein diets may also be associated with increased risk for coronary heart disease due to intakes of saturated fat, cholesterol, and other associated dietary factors. When diets high in protein are severely limited in carbohydrates, food choices become restrictive, and overall nutrient adequacy and long-term palatability are
also of concern. Successful weight loss occurs most frequently when a nutritionally adequate diet that allows for caloric deficits ('500 kcal/d for each 1 lb lost per week) is tailored according to individual food preferences. A minimum of 1200 kcal/d for women and 1500 kcal/d for men should be provided. Total energy deficit has the greatest overall impact on weight reduction, especially when coupled with increased physical activity and behavior modification to maintain negative energy balance. Over the long term, diet composition should be consistent with a balanced eating plan that supports weight maintenance and lowers chronic disease risk.
protein intake above the required amount is inefficiently used by the body and imposes the additional burdens of metabolizing and excreting excess waste products (eg, urea and ammonia) by the liver and kidney
Low-protein diets (,10% of total energy) are sometimes prescribed to treat kidney and liver disorders.
Extra protein is not used efficiently by the body and may impose a metabolic burden on the kidneys and liver.
High-protein diets may also be associated with increased risk for coronary heart disease due to intakes of saturated fat, cholesterol, and other associated dietary factors.
Elderewen a écrit:En tout cas, moi je jette l'éponge et je vous laisse à vos certitudes...
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