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Linformazione è la chiave di volta per le malattie rare
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Lettera aperta degli Omeopati FIAMO al Consiglio Regionale, alla Giunta Regionale e ai Partiti politici della Regione Lazio
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Ferruccio Fazio ha visitato il Centro Clinico NEMO
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Mario Melazzini sul testamento biologico
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Testamento biologico. Iardino: "Sia rispettata la volontà dei pazienti"
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Anche le cellule passano le frontiere - Tavola Rotonda, mercoledì 11 marzo 2009, ore 10,30
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Autismo, iperattività, epilessia, metabolismo, tossicologia, nutrizione e riabilitazione: approccio biologico e terapeutico
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Può la Programmazione Neuro Linguistica migliorare la complìance?
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X° Congresso Nazionale SICOP
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Uroandrologia Ricostruttiva
Cellula cancerosa
AMAVAS
Onlus For a smile
Semeiotica biofisica
Chirurgia Laser
Otorinolaringoiatria
Prevenzione prostata
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Home Rassegna stampa Ultime pubblicate Un confronto tra diete dimagranti aventi differenti percentuali di grassi, proteine e carboidrati |
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| Un confronto tra diete dimagranti aventi differenti percentuali di grassi, proteine e carboidrati |
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Background: The possible advantage for weight loss of a diet that emphasizes protein, fat, or carbohydrates has not been established, and there are few studies that extend beyond 1 year.
Methods: We randomly assigned 811 overweight adults to one of four diets; the targeted percentages of energy derived from fat, protein, and carbohydrates in the four diets were 20, 15, and 65%; 20, 25, and 55%; 40, 15, and 45%; and 40, 25, and 35%. The diets consisted of similar foods and met guidelines for cardiovascular health. The participants were offered group and individual instructional sessions for 2 years. The primary outcome was the change in body weight after 2 years in two-by-two factorial comparisons of low fat versus high fat and average protein versus high protein and in the comparison of highest and lowest carbohydrate content.
Results: At 6 months, participants assigned to each diet had lost an average of 6 kg, which represented 7% of their initial weight; they began to regain weight after 12 months. By 2 years, weight loss remained similar in those who were assigned to a diet with 15% protein and those assigned to a diet with 25% protein (3.0 and 3.6 kg, respectively); in those assigned to a diet with 20% fat and those assigned to a diet with 40% fat (3.3 kg for both groups); and in those assigned to a diet with 65% carbohydrates and those assigned to a diet with 35% carbohydrates (2.9 and 3.4 kg, respectively) (P>0.20 for all comparisons). Among the 80% of participants who completed the trial, the average weight loss was 4 kg; 14 to 15% of the participants had a reduction of at least 10% of their initial body weight. Satiety, hunger, satisfaction with the diet, and attendance at group sessions were similar for all diets; attendance was strongly associated with weight loss (0.2 kg per session attended). The diets improved lipid-related risk factors and fasting insulin levels.
Conclusions: Reduced-calorie diets result in clinically meaningful weight loss regardless of which macronutrients they emphasize.
The New England Journal of Medicine 2009, vol. 360, n. 9, pp. 859-873
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