Total, insoluble and soluble dietary fibre intake in relation to blood pressure: the INTERMAP Study.

Auteur(s) :
Van Horn L., Stamler J., Chan Q., Daviglus ML., Elliott P., Aljuraiban GS., Griep LM., Frost GS.
Date :
Sep, 2015
Source(s) :
The British journal of nutrition. #114:9 p1480-1486
Adresse :
Department of Epidemiology and Biostatistics,School of Public Health,MRC-PHE Centre for Environment and Health,Imperial College London,London W2 1PG,UK. g.frost@imperial.ac.uk

Sommaire de l'article

Prospective cohort studies have shown inverse associations between fibre intake and CVD, possibly mediated by blood pressure (BP). However, little is known about the impact of types of fibre on BP. We examined cross-sectional associations with BP of total, insoluble and soluble fibre intakes. Data were used from the INTERnational study on MAcro/micronutrients and blood Pressure (INTERMAP) study, including 2195 men and women aged between 40 and 59 years from the USA. During four visits, eight BP, four 24 h dietary recalls and two 24 h urine samples were collected. Linear regression models adjusted for lifestyle and dietary confounders to estimate BP differences per 2 sd higher intakes of total and individual types of fibre were calculated. After multivariable adjustment, total fibre intake higher by 6·8 g/4184 kJ (6·8 g/1000 kcal) was associated with a 1·69 mmHg lower systolic blood pressure (SBP; 95 % CI -2·97, -0·41) and attenuated to -1·01 mmHg (95 % CI -2·35, 0·34) after adjustment for urinary K. Insoluble fibre intake higher by 4·6 g/4184 kJ (4·6 g/1000 kcal) was associated with a 1·81 mmHg lower SBP (95 % CI -3·65, 0·04), additionally adjusted for soluble fibre and urinary K excretion, whereas soluble fibre was not associated with BP. Raw fruit was the main source of total and insoluble fibre, followed by whole grains and vegetables. In conclusion, higher intakes of fibre, especially insoluble, may contribute to lower BP, independent of nutrients associated with higher intakes of fibre-rich foods.

Source : Pubmed
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