Centuries ago when I was a teenager we would crush a charcoal tablet and put it on the toothpaste and brush. I'm sure after seeing your mouth and teeth so black, they definitly looked very white. Then we would head off to the pub. If us girls couldnt afford wine, we would swallow a few charcoal tablets so we could drink beer and not get full of gas and burp alot. Ahh the memories. Thanks for that