Scientists have solved the mystery of why some German beers have higher levels of arsenic than others.
The researchers found that arsenic was released from kieselguhr, or diatomaceous earth, a widely used filtering material used to brew the beer.
While the levels of arsenic found in the beer are not likely to cause any harm, the scientists said breweries, wineries and other food processors should be aware that kieselguhr can release arsenic.
Other substitute filtering materials can be used instead of kieselguhr and arsenic can be removed by washing the material.
Read more at Technische Universität