I hope that the product reviews will help you. I will have more to say about these products in a few weeks.
My teeth are very dark, I was not always this way. My teeth became dark around the age of 14. I have had them checked by dentists and dental hygienists for many years. I tried tooth whiteners and other whitening products, but nothing works. I then decided to do some research. I wanted to find a natural product that could lighten my teeth. I bought several natural and organic products, but they were expensive and did not seem to work. Then I found Natura Dentifrice, a natural whitener which works! They make some pretty colorful products as well. I have been using it for the past year and it has worked to a great degree! The color has increased a lot in my teeth. They now look like they were taken out of the stone age. It is not perfect, but it is better than the alternative! The one negative is that they don't have any other color options, so they are not as effective for other people. They are $15 for 20ml. But if I can afford that, it should be a great option for you. If you are a heavy user of caffeine, they are a great alternative.