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Calorie or Caloric restriction (CR) is the of limiting dietary energy intake in the hope that it will improve health and retard aging. In human subjects, CR has been shown to lower , fasting glucose, and blood pressure. Some consider these to be of aging, since there is a between these markers and risk of diseases with aging. Except for (below), animal species tested with CR so far, primates, rats, mice, spiders, , C. elegans and rotifers, have shown . CR is the only known dietary measure capable of maximum lifespan, as opposed to average lifespan. In CR, energy intake is , but of vitamins, minerals and other must be eaten. To the between CR and mere "FR" (food restriction), CR is often referred to by a plethora of other names such as CRON or CRAN (calorie restriction with optimal/adequate ), or the "high-low diet" (high in all nutrients aside from calories, in which it is "low").
Read more in the Wikipedia entry for Calorie restriction
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