There is still a policy question that needs science information though. If the other ingredients can never magnify toxicity, then lets not bother incurring the cost of testing the whole formulation sold to the punters. But how on earth could you prove that?
With that background, here is an update based on what I've discovered from inquiries since my last post on this topic.
- My recall of what Seralini said appears accurate. He apparently referred to this paper which includes the following statement. "Since pesticides are always used with adjuvants that could change their toxicity, the necessity to assess their whole formulations as mixtures becomes obvious". Makes sense to me.
- While the claim was probably stunning for many of us, this is actually very old news for Seralini. Check out this paper from 2005.
- The ability of adjuvants to increase the toxicity of "active ingredients" is not restricted to glyphosate. These people (none of whom are Seralini) say much the same thing about the insecticides Talstar and Termidor, concluding that "increased toxicity due to inert ingredients should be considered in risk assessments and regulation of insecticides".
- The German government (none of whom are Seralini) is also concerned. Its regulator "believes that there is convincing evidence that the measured toxicity of some glyphosate containing herbicides is the result of the co-formulants in the plant protection products."
I understand that SciBlogs will be commenting on this issue tomorrow, which is great. Debates need two sides.