Aspectos metabólicos y dietarios involucrados en la etiología de la obesidad en mujeres chilenas / Metabolic and dietary factors involved in the etiology of obesity in chilean women
Rev. méd. Chile
; 127(9): 1126-35, sept. 1999. ilus, tab
Article
em Es
| LILACS
| ID: lil-255291
Biblioteca responsável:
CL1.1
ABSTRACT
This review discusses the factors involved in the aetiology of obesity. The effect of dietary macronutrient composition on the metabolic fate of fat (oxidation or storage) is emphasised. Available information on dietary intake in adults from food balance sheets or dietary surveys, show that females eat a relatively low amount of fat (50-70 g/d on average), although this seems to be rising. The increasing prevalence of obesity in our population could be related to the glycemic index of meals, their fatty acid composition and the time interval between meals. This paper compares the oxidation rates of different fatty acids, particularly polyunsaturated fatty acids (PUFA), and among these, the high oxidation rates found for a-linolenic and linoleic acids. Medium chain saturated fatty acids (C8 to C12) are more likely to be oxidised in comparison with PUFA and longer chain saturated fatty acids. The latter are more likely to be directed to fat storage, particularly when they are combined with highly glycemic carbohydrates (CHO) in the same meal. Given the large proportion of CHO in the usual diet, the relevance of de-novo lipogenesis from CHO is questioned. It is concluded that this route is not readily used in humans consuming normal diets. Therefore, this mechanism can not be responsible for the rising prevalence of obesity
Texto completo:
1
Índice:
LILACS
Assunto principal:
Metabolismo Basal
/
Comportamento Alimentar
/
Obesidade
Tipo de estudo:
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Female
/
Humans
País/Região como assunto:
America do sul
/
Chile
Idioma:
Es
Revista:
Rev. méd. Chile
Assunto da revista:
MEDICINA
Ano de publicação:
1999
Tipo de documento:
Article
/
Project document