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by Liz Ward

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Please copy/paste the following text to properly cite this HowStuffWorks article:

Ward, Liz.  "What causes aging?"  19 August 2007.  HowStuffWorks.com. <http://health.howstuffworks.com/wellness/aging/aging-process/aging-causes.htm>  27 May 2012.
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Transformation Diaries

Real women, incredible transformations

Inside this Article
  1. What causes aging?
  2. Aging Causes: Nature or Nurture?
  3. Aging Biology: How do cells age?
  1. Aging Theories: Genes vs. Lifestyles
  2. Lots More Information
  3. See all Aging Process articles

Lots More Information

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