All are rich in naturally occurring chemicals, known as polyphenols, which have been linked to a variety of health benefits including protection against heart disease.
He said that foodstuffs on the list, which is dominated by fruits and vegetables, can also help to slow down the ageing process by helping to protect cells from the natural damage that occurs over time.
He said: "Epidemiology studies support the protective effects of polyphenol-rich foods. Lack of these components in the diet, because of low intake of fruit and vegetables, increases the risk of chronic disease.
"This means that they are essential to fulfil the maximum individual lifespan, and so I propose that they are 'lifespan essential'." More...