From: ouasami@do-not-send.com   
      
   Perfluorooctanoic acid (PFOA) is commonly used as the teflon coating on   
   frying pans. I vaguely remember reading an article that says before   
   PFOA, it had been perfluorobutanoic acid that was used as the teflon   
   coating on frying pans. It was later found that perfluorobutanoic acid   
   widely existed in people's blood stream. Thus, it was replaced by PFOA,   
   which is not as easy to enter people's blood stream.   
      
   I cannot find any reference about this. Is this just my imagination? Can   
   someone confirm it?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)