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Lipid, protein and carbohydrate intake in relation to body mass index


Objective: To examine whether the same amount of energy intake has different consequences on body mass index (BMI), depending on the source of energy from specific macronutrients.

Design: Cross-sectional study, in the context of the European Prospective Investigation into Cancer and nutrition (EPIC).

Setting: Communities all over Greece.

Subjects: A total of 27 862 apparently healthy volunteers, men and women, ages 25–82 y.

Interventions: None.

Methods: Dietary information was collected through an interviewer-administered semi-quantitative food frequency questionnaire. In the context of a cross-sectional analysis, we calculated changes of BMI per increments of energy intake from protein, carbohydrates, saturated, polyunsaturated and monounsaturated lipids and ethanol, controlling for mutual confounding and other confounders, among all participants, and after exclusion of under-reporters and/or those on a diet.

Results: Protein intake was positively associated with BMI. The association was evident when nutrients were not mutually adjusted for and increased after mutual adjustment among nutrients (β=0.80 kg/m2 per 418.4 kJ or 100 kcal increment, 95% confidence interval 0.55–1.06 for men, and β=1.59, 95% CI 1.30–1.88 for women), as well as after exclusion of under-reporters and/or those on a diet. The effects of other macronutrients were less substantial or consistent.

Conclusions: There is evidence indicating that protein intake is conducive to obesity. Moreover, our data suggest that neither saturated or monounsaturated lipids nor carbohydrates are likely to play a major role in increasing BMI over and beyond that indicated by their energy content.

Sponsorship: EPIC-Greece is supported by the Europe Against Cancer Program of the European Commission and the Greek Ministry of Health.

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The European Prospective Investigation into Cancer and nutrition (EPIC) is co-ordinated by the International Agency for Research on Cancer (IARC) and supported by the Europe Against Cancer Program of the European Commission. The Greek segment of the EPIC study is also supported by the Greek Ministry of Health.

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Trichopoulou, A., Gnardellis, C., Benetou, V. et al. Lipid, protein and carbohydrate intake in relation to body mass index. Eur J Clin Nutr 56, 37–43 (2002).

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  • protein
  • lipids
  • carbohydrates
  • body mass index
  • obesity

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