I think I'm posting this story more for the beautiful webpage, copied below, than the technology story – who said food science was dreary? The beautiful colours alongside the clinical structures is appealing. Lets not worry that it's about flavours not colours!
click the image to visit the website
In seriousness, the scientists have been evaluating thousands of flavours. With around 2500 already approved and these 7 being banned for human use. The 7 substances which are mainly natural compounds from plant sources, have been used in the food industry for many years. The affected parties, such as flavour manufacturers, note that there are no negative effects evident from their moderate consumption over the years.