Some, but not all, companies hide potentially harmful ingredients behind the term "natural flavors." EPIC has written an article on that subject.   I recently learned that "natural flavors" aren't as harmless as you might think — despite their name. In reality, natural flavors are often manufactured in labs, much like artificial flavors, and the final products often contain chemicals from that manufacturing process. The problem is that the FDA requires companies to use "natural flavors," even if those flavors come from dehydrated sources of whole foods. I've sent out inquiries to all brands to ask what's behind their "natural flavors," and I'll keep updating this article as I learn more. The good news is that all brands that I've heard back from use natural flavors that are true to their word and don't contain any harmful chemicals.