speech on eat healthy
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A study of more than 1,500 middle-aged men found those who eat 60 grams of vegetables a day live longer than those who eat less than 20g a day.
The benefits for smokers are even more impressive, with a healthy diet extending their life expectancy by just over two years. But smokers still died sooner than non-smokers.
The findings, highlight the extent a diet rich in fruit and vegetables protects against ill-health.
They throw further doubt on the safety of the high-protein, high-fat Atkins Diet, which has become popular with millions.
Nutrition experts have warned that the 'faddy' diet - in which vegetables and fruit are limited - is 'medically unsound' and a 'massive health risk'.
The results of the research by scientists at the University of Perugia in Italy underlines the well-known benefits of eating fruit and vegetables.
Ann Nugent, an adviser with the British Nutrition Foundation, said the report endorses the need to eat at least five portions - equal to 400g - of fruit and vegetables a day.
She added: 'Many people find it hard to keep to five portions a day but if this encourages them to do that then that's great.'
Researchers tracked 1,536 Italian men aged 45 to 65 over 30 years. The results were published in the journal Annals of Epidemiology.