Figure 4:Urea in blood serum of Danish cows. Significant differences were seen between different farms. Ab: p< 0.001, cd: p< 0.001, ef: p< 0.001, gh: p< 0.001, ij: p< 0.001. Mean levels of farms K, R, V, S were above the upper limit reference value (20-30 mg/dL). Linear function between high glyphosate in urine (ng/mL) and urea (mg/dL) in blood serum were found (R= 0.72; Y= 0.786x-0.355).