[s1gnp0st]

Yep, and how do we even begin to model the interactions between these?

The burden of proof is upon those introducing novel substances into my food.

[fransje26]

That's funny, because as researchers are finding out, the interaction of many chemicals are having significant effects at concentrations 1 to 2 orders of magnitude below the "safe" values of acceptable daily intakes.

They funded a state-of-the-art ecotoxicology research lab next to where I live, that was going to do pioneering work in the field, within a university-industry cooperation framework. As coincidence would have it, once the first results started coming in, there was a lot less interest from the industry in cooperation. The lab now runs at a fraction of its capacity.

[amelius]

> The burden of proof is upon those introducing novel substances into my food.

But in the case of interaction between substance A and B from different vendors, who's responsible?

[s1gnp0st]

Both are responsible, the one who spilled gasoline, and the one who flicked a match.

[rtkwe]

The quick answer is whoever's bringing the thing to market second but both should continuously monitor for interactions.