There was a congressional hearing on glyphosate on June 14th, 2016. The EPA (environmental protection agency) and the CARC (Cancer Assessment Review Committee) claim glyphosate is "Not Likely to be Carcinogenic to Humans). However, IARC (International Agency for Research on Cancer) claims it is likely to be carcinogenic to humans. The data would support IARC.
At a recent congressional hearing the data seemed to speak loud and clear that glyphosate is associated with a number of health conditions and needs to be better studied. The studies that exist also need to be better paid attention to.
The people who testified at that hearing have their testimony available at this link. I suggest you take a look at it. You will learn what it is used on, how much is used in our country. You will also learn what hazards are associated with it, and which diseases have risen in conjunction with increased use of glyphosate on our food supply. If this is a bit much for you to go through and you would rather listen to a lecture, I suggest going to you tube and listening to one or two of Stephanie Seneff's lectures. She is one of the presenters at the congressional hearing. Her web page also has a long list of her papers she has written and presentations of which many are on glyphosate. You will find them here.