Our current regulatory system focusses solely on assessing the risk posed to human health by individual pesticides, failing to account for interactions between multiple chemicals. Pesticides are tested in isolation for harmful effects and are not looked at in combination. This system not only fails to protect us from the cocktail effect, it completely ignores the issue.
This is a serious shortcoming. We are being exposed to cocktails of multiple pesticides via dietary intake and yet almost nothing is known about how these chemicals are interacting or the potential health effects of this repeated exposure.