Cheerios and 29 other Cereals test positive for glyphosate:  

https://www.organicauthority.com/buzz-news/gmo-free-cheerios-test-positive-for-monsantos-roundup-herbicide. 

Analysis of individual tissues demonstrated that bone contained the highest concentration of [14C] glyphosate equivalents (0.3–31ppm). The remaining tissues contained glyphosate equivalents at a concentration of between 0.0003 and 11 ppm. In the bone and some highly perfused tissues, levels were statistically higher in males than in females.