Experts advise us to eat more fruit and veg; boost protein and fibre intake; make sure we get the optimum levels of vitamins and minerals.
But what actually happens to these nutrients once they are inside the body?
Food scientists, working in an area called bioavailability, are trying to answer this question in a bid to discover how people can get the very best out of what they eat: http://news.bbc.co.uk/2/hi/health/4777607.stm.
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