Breakfast foods are widely contaminated with glyphosate. Independent testing found glyphosate, the active ingredient in Roundup weedkiller, in most oat-based products like cereals, granola bars and oatmeal. Some samples of Quaker Oats and Cheerios had levels far above what scientists consider safe for children. Glyphosate is a probable cause of cancer. The World Health Organization (WHO) classifies glyphosate as a probable carcinogen, linked to a 41% higher risk of non-Hodgkin lymphoma.