Filtration Technique used in commercial beer production found to contaminate end product with arsenic, heavy metals.

   Beer is a type of commodity that is subsequently processed in order to be suitable and clear for consumption. Recently, there is a global attention and research concerning application of powdery substances in order to pull impurities out of beer.

   A research was conducted and presented at the 245th National Meeting and Exposition of American Chemical Society. The research identified a diatomaceous earth, that is used by some breweries in processing and filtration of commercial beer, which can be source of arsenic and other toxins. The origin of the research focused on Germany as samples of beers were detected with high levels of arsenic. Levels of arsenic along with other contaminants were found to be higher in beer samples, than in the water used to make beer. 

   Researchers concluded that arsenic was released into the German beer samples through a filtering material, known as kieselghuhr or through application of a diatomaceous earth used to remove yeast, hops and other particles in order a crystal clear appearance to be generated for beer. 

http://www.sciencedaily.com/releases/2013/04/130407183550.htm

http://www.naturalnews.com/045413_arsenic_heavy_metals_beer_production.html