|Researcher Shahid Parvez (IUPUI photo)|
The researchers thought public drinking water supplies was the primary source of glyphosate exposure, but none of the tested water samples showed glyphosate residue. Rather, the main source of glyphosate intake seemed to be consumption of genetically modified food items and caffeinated beverages. "Use of glyphosate is heaviest in the Midwest due to corn and soybean production," Schneider reports. "Its residues are found in the environment, major crops and food items that humans consume daily."
Researchers found that 66 of the 71 women in the study, 93 percent, had glyphosate in their urine. "We found higher urine glyphosate levels in women who lived in rural areas, and in those who consumed more caffeinated beverages," Parvez said. The samples were obtained while the women received routine prenatal care.