If you are looking for something that will help you improve your teeth, I have come up with 5 natural products that have been proven to work for brightening your teeth. The products are: 2-Bromocresol 3-Methyl-3-Butoxychromic Acid (Bromocresol 3M) The Bromocresol 3M is used to brighten dark teeth. You might be wondering why a product like Bromocresol 3M is helpful. This chemical is a yellow-green dye that is commonly used as a coloring for toothpaste and lip gloss, but the color is not the main reason. The main reason is that Bromocresol 3M can actually brighten the teeth. Some people think that this chemical would be an irritant, but in fact, it will help to brighten your teeth. The same can be said for the other products listed below. They may also be helpful for those with red teeth or red and black eyes. They don't brighten the teeth like most dentists recommend, though, so these products may not be right for everyone. If you're concerned that you may be allergic to Bromocresol, try giving these products a try. You should not put these products on your lips or hands, because they contain a lot of hydrogen cyanide, and could cause skin irritation.