Proof mounts on restricted diet

Cutting calories may delay the aging process and reduce the risk of disease, a long-term study of monkeys suggests.

Over 20 years, monkeys whose diets were not restricted were nearly three times more likely to have died than those whose calories were counted.

Writing in Science, the US researchers hailed the "major effect" of the diet.

It involved reducing calorie intake by 30% while maintaining nutrition and appeared to impact upon many forms of age-related disease seen in monkeys, including cancer, diabetes, cardiovascular disease and brain atrophy.

Whether the same effects would be seen in humans is unclear, although anecdotal evidence so far suggests people on a long-term calorie-restricted diet have better cardiovascular health.

The precise mechanism is yet to be established: theories involve changes in the body's metabolism or a reduction in the production of "free radical" chemicals which can cause damage.

The benefits of calorie restriction are well documented in animals, but now the results have been replicated in a close relative of man over a lengthy period.

Over 20 years, monkeys whose diets were not restricted were nearly three times more likely to have died than those whose calories were counted.

Writing in Science, the US researchers hailed the "major effect" of the diet.

It involved reducing calorie intake by 30% while maintaining nutrition and appeared to impact upon many forms of age-related disease seen in monkeys, including cancer, diabetes, cardiovascular disease and brain atrophy. click for more news..