Reported research findings may show apparent bias, depending on the source of funding for the study, as has been suggested for industry-funded research on BPA (EEA 2013). However, it has been argued that guidelines based on more traditional toxicity testing, using exposure to relatively high contaminant concentrations of a single substance, are not appropriate to pick up more subtle changes that can affect a large proportion of the population, with mixtures of plastic-related compounds (Talsness et al.