Calorie Restriction / Protein Restriction

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The LEF News notes a study suggesting at least some of the characteristic biochemistry of calorie restriction (CR) can be obtained by restricting just proteins in the diet: "Previous studies have shown that [CR] decreases mitochondrial oxygen radical production and oxidative DNA damage in rat organs, which can be linked to the slowing of aging rate induced by this regime. These two characteristics are also typical of long-lived animals. However, it has never been investigated if those decreases are linked to the decrease in the intake of calories themselves or to decreases in specific dietary components." It remains to be seen whether the results of this study translate into actual healthy life extension in mice, as for CR.

Link: http://www.lef.org/news/LefDailyNews.htm?NewsID=2117&Section=AGING