Do not buy CREST Pro Health products
Actually, probably safer to just don't buy any Crest products.
This stuff is pretty much poison.. it causes bleeding gums, loss of taste, brown stained teeth, white mucus in mouth.
Just google "Crest Pro Health". I called Proctor & Gamble and they are aware of the horrible issues with the product... WTF!
http://andywibbels.com/2007/01/crest-pr ... eth-brown/