New stain repellent chemical doubling in blood every 6 years.

New stain repellent chemical doubling in blood every 6 years.
http://www.environmentalhealthnews.org/ehs/newscience/2012/08/2012-1120-fluorinated-stain-repellent-rises-in-blood/

"As the phased-out stain repellent PFOS steadily decreases in people, its replacement is rising rapidly at levels that are doubling every six years, a Swedish study shows. Levels of perfluorobutane sulfonate (PFBS) in the women's blood rose 11 percent per year between 1996 and 2010. Whether there are any potential health effects of these exposures -- which are still far lower than PFOS levels -- is unknown."