[
Science,
2002]
How much you eat, not what you eat, seems to make a difference in the aging process. It is well established that reduced calorie consumption robustly extends adult life expectancy in a variety of animal models. Now, on page 120 of this issue, Larsen and Clarke show that diet quality also affects aging. In the worm Caenorhabditis elegans, reduced consumption of coenzyme Q (Q) dramatically extends longevity.