I might be remembering things wrong, but doesn't a lot of chewing gum have Titanium Dioxide as its whitening agent for teeth?
Strangely, they don't have to list the titanium dioxide in the ingredients.
Holding up a glass of grass fed cow milk to store bought milk really shows the difference. The store bought milk suddenly looks bleached white, like liquid paper.
Thats illegal, they have at least to mention "Artificial coloring"
Also it's only added to skim milk, ratacat post about industrial milk and whatever isn't true.