Well, I guess it's better than ethylene glycol! (Pink icing on your cupcakes anyone???!)

"Propylene glycol... is also used to absorb extra water and maintain moisture in certain medicines and cosmetics, and is a solvent for food colors and flavors.
Propylene glycol is used in antifreeze and de-icing solutions. It is used as a solvent in the paint and plastics industries, and to make polyester compounds.
It is used as a substitute for ethylene glycol mono-alkyl ethers in all-purpose cleaners, coatings, inks, nail polish, lacquers, latex paints, and adhesives."
and there was more... aaackk

More natural and unnatural colours in this weeks Totally Informal Transglobal Challenge can be found >>HERE<<