Weed-killing chemical found in majority of urine samples

(CNN) — A new study shows a popular weed-killing chemical is in more than 80 percent of the nation’s urine samples. 

The controversial herbicide, glyphosate, has been linked to cancer.  

Its the active ingredient in the widely used Roundup brand, a weed control product. 

The company is at the center of thousands of lawsuits claiming it causes cancer.  

Farmers spray the pesticide, which has been found in a variety of food, including baby formula.