Subject: Can you verify that atoms are turned over every seven years in humans?

What is the source of this claim?  I am very interested by this, but I can't 
confirm it to my family of Drs. (two) and a Biologist mother.  Please help me 
identify where Steve Mack, Post-doc/Fellow, Molecular and Biochemistry, 
Children's Hospital Oakland Research Institute got this information:  The 
atoms in your body go through a complete turnover about once every seven 
years. 

Thanks!
Mark Gladden

Re: Can you verify that atoms are turned over every seven years in humans?