The Environmental Working Group (EWG) said Wednesday that a third round of tests found that all but four samples of kids’ breakfast cereals tested positive for glyphosate, the world’s most widely used herbicide and a key ingredient in Monsanto’s Roundup weedkiller.
The nonprofit said that glyphosate was detected in all 21 oat-based cereal and snack products sampled, and that all but four product samples contained levels of glyphosate higher than what EWG calls its “children’s health benchmark” of 160 parts per billion, which it refers to as a “sufficient margin of safety.” See the full list below.
EWG said the two highest levels of glyphosate were found in Honey Nut Cheerios Medley Crunch with 833 ppb, and Cheerios with 729 ppb.
EWG had released a first round of test results in August showing that all but two of the 45 conventional, oat-based product samples tested detected glyphosate, and 31 samples had levels above EWG’s health benchmark of 160 ppb.
About one-third of 16 samples made with organically grown oats also tested positive for glyphosate, all at levels well below EWG’s health benchmark.
A second round of test results released in October found that all samples of kids’ breakfast cereals under the Cheerios and Quaker Oats brands tested positive for glyphosate.
EWG said it purchased the product samples from online retailers. The nonprofit said it packed about 300 grams of each product at its Washington, D.C., office and shipped them to Anresco Laboratories in San Francisco. Glyphosate levels were analyzed by a liquid chromatography tandem mass spectrometry method described here.
Here is the list of cereal samples tested in May: