| Calorie restriction speeds cellular "recycling" of mitochondriaMitochondria are central to many theories of aging because they produce damaging reactive oxygen species (ROS) as a by-product of normal function. Over time, ROS can degrade mitochondrial DNA (mtDNA), interfering with cellular energy production. The cell’s strategy for dealing with this damage is to recycle its mitochondria on a regular basis. A new study shows that calorie restriction increases the rate at which this recycling takes place. |
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