Formaldehyde
Finally, a scientific look at what formaldehyde actually is, what it does, and why it is in vaccines.
Formaldehyde is a normal, essential human metabolite with a biological half-life of about 1.5 minutes (Clary and Sullivan 2001). It is endogenously produced and is involved with methylation reactions for and biosynthesis of some proteins and nucleic acids. It is also rapidly metabolised to formate and excreted in urine or to carbon dioxide and exhaled (WHO, 2006 and Clary and Sullivan 2001). ~ JustTheVax
Edited: May 12th, 2009