International Journal of Epidemiology 2002;31:320-327
© International Epidemiological Association 2002
Point-Counterpoint |
Commentary: Salt, blood pressure and health
a Blood Pressure Unit, St George's Hospital Medical School, Cranmer Terrace, London SW17 0RE, UK. E-mail: gmacgreg@sghms.ac.uk
b Department of Clinical Chemistry, Imperial College of Technology and Medicine, Charing Cross Campus, St Dunstan's Road, London W6 8RP, UK. E-mail: h.dewardener@ic.ac.uk
The Yanomamo Indians still lead a life very similar to the last million or so years of our evolution,1 and like primitive man eat a diet that is very low in salt and saturated fat and high in fruit, vegetables and roots.2 The Yanomamo Indians are not overweight, do not smoke and are very fit. Their blood pressure does not rise with age although they spend much of their time fighting and are under great stress.3 This tribe does not develop vascular disease, although many die of infection. However, when they migrate to a Venezuelan or Brazilian town and adopt a western lifestyle, they, like native Americans, become overweight and develop diabetes and premature vascular disease. They appear therefore, to be a group which, though predisposed to vascular disease, is protected by the way they live. There are other similar examples4 which clearly indicate that cardiovascular disease (strokes, heart attacks
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