aging
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Aging kills 100,000 out of the 150,000 people that die each day worldwide and inflicts an enormous amount of suffering. No other problem facing humanity can equal this tragedy. Aging is caused by the accumulation of damage in the human body that leads to age-related disease and eventually death.
Campaign Against Aging
How Age-Damaged Mitochondria Cause Your Cells To Age-Damage You Free radicals , and reactive oxygen species (ROS) in particular, play an important part in aging. These are (usually small) molecules lacking an electron needed for stability; they will steal an electron from the first thing they bump into.