Why foreigners don't trust the food in the US. Glyphosate, active ingredient in Roundup has been linked in study after study to non-Hodgkin’s lymphoma and other serious health conditions. It doesn’t just kill weeds. It kills the bacteria in your gut. Research shows it damages bifidobacterium, one of the most critical probiotic strains for immune function and affects up to 54% of the microbes in your gut microbiome. It’s sprayed on the majority of non-organic crops. Wheat. Oats. Corn. Soy.