Take propylene glycol for instance. Doesn't sound particularly tasty but you have probably consumed it at one point or another. It is a common food additive used to help foods retain their water. The most popular example would be blueberries. No they don't add it to blueberries to keep them plump, they MAKE 'blueberries' using it (in combination is sugars and oils).
There are some blueberry products out there that don't have blueberries in them at all including muffins and cereals!
Want to know what else propylene glycol is used for?
-Non toxic antifreeze for water tanks
-To de-ice the wings on air craft carriers
-As part of the drink you take to empty and prep your bowels before a colonoscopy
-As the main ingredient in deodorant sticks
-Used in smoke machines
Mmmmmmm....now while it hasn't been proven to be toxic, doesn't it irk you a little bit that your supposed 'blueberries' might not actually be blue berries but just sugar, soybean oil and the same product you use to stop your pits from sweating?
Something to think about.