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Eating less could lead to a longer life.

Ever since Clive McCay published his landmark 1935 study that showed mice with severely restricted diets lived 33% longer, many have wondered whether caloric restriction could extend the human life span, too.

It makes for an interesting philosophical question: Would you trade the joy of eating for a longer life?

There are a few reasons why some say this type of caloric restriction could work to extend human life spans. First, larger animals tend to live longer than smaller ones because they have slower metabolic rates. When we consume fewer calories, we have less to metabolize.

Second, it’s speculated that caloric restriction reduces free radical damage in the body, slowing the aging process.

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