Calories May Not Count in Life Extension

By Christen Brownlee, 15:52 PM April 15, 2008

An overwhelming amount of new data has built up over the past several decades suggesting that limiting food intake can extend almost any organism's life, from the lowly flatworm to the ubiquitous lab mouse. Although scientists haven't yet nailed down the mechanism behind this phenomenon, most hypotheses have focused on the number of calories in a diet—the fewer an organism takes in while still meeting its nutritional needs, the longer it's likely to live (SN: 5/11/02, p. 291: Dogged Dieting:...

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