Human acute toxicity is dose related. Acute fatal toxicity has been reported in deliberate overdose. Epidemiological studies have not found associations between long term low level exposure to glyphosate and any disease.

The EPA considers glyphosate to be noncarcinogenic and relatively low in dermal and oral acute toxicity. The EPA considered a "worst case" dietary risk model of an individual eating a lifetime of food derived entirely from glyphosate-sprayed fields with residues at their maximum levels. This model indicated that no adverse health effects would be expected under such conditions.

The European Commission's review of the data conducted in 2002 concluded that there was equivocal evidence of a relationship between glyphosate exposure during pregnancy and cardiovascular malformations; however, a review published in 2013 found that the evidence "fails to support a potential risk for increased cardiovascular defects as a result of glyphosate exposure during pregnancy."

*John P. A. Loannidis, PLOS Medicine, 2005
Begley, C. G. & Ellis, L. M. Nature 483, 531–533 (2012).
Flrian et. Al., Nature Reviews Drug Discovery 10, 712 (2011)

"The statistical analyses published by Séralini
and colleagues therefore provide no grounds
to revise previous conclusions regarding the
safety of food derived from GM corn lines
MON863, NK603 and MON810"

http://www.foodstandards.gov.au/consumer/gmfood/adve...

Food Standards Australia New Zealand (FSANZ) is an independent statutory agency established by the Food Standards Australia New Zealand Act 1991. FSANZ is part of the Australian Government's Health portfolio.