http://pipeline.corante.com/archives/2013/04/30/is_g...

Now, that presumably sounds extremely detailed and impressive if you don't know any toxicology. What you wouldn't know from reading through all of it is that their reference 121 actually tested glyphosate against human CYP enzymes. In fact, you wouldn't know that anyone has ever actually done such an experiment, because all the evidence adduced in the paper is indirect - this species does that, so humans might do this, and this might be that, because this other thing over here has been shown that it could be something else. But the direct evidence is available, and is not cited - in fact, it's explicitly ignored. Reference 121 showed that glyphosate was inactive against all human CYP isoforms except 2C9, where it had in IC50 of 3.7 micromolar. You would also not know from this new paper that there is no way that ingested glyphosate could possibly reach levels in humans to inhibit CYP2C9 at that potency.