I spotted this little article on Facebook this morning and it piqued my interest.Have you ever noticed the different colored tabs on toothpaste tubes? According to what I read, here's what the colors mean:

Green : Natural.
Blue : Natural + Medicine.
Red : Natural + Chemical composition.
Black : Pure Chemical.

Pretty interesting!

Actually, according to some research I did on the web I found these claims to be a hoax.

The marks have something to do with the printing process and generally has to do with the color of the print on the tube.

Now you know!