I don't speak for the manufacturer or any of the manufacturers. Please keep in mind that these recommendations are just my opinion and should not be considered the only way to go about improving your teeth.
Tooth whitening products are most often found in salons and dental practices. They often have their own websites with lots of information about how to use their products. I can't tell you how many times I have seen people buy products just because they have read the website. Here are some things to keep in mind when choosing between a whitening and an acid-free product: The whitening products typically include a whitening solution, a whitening toothpaste, or a whitening toothpaste with whitening ingredient. A whitening product also usually contains some kind of preservative (such as tartaric acid) and may have some type of whitening ingredient. I always recommend using a whitening product, as the whitening ingredient provides more whitening benefits. Also, most whitening products contain acid, so you may want to use one with a tartaric acid. In many cases, there are several whitening products that are available, with different whitening ingredients. I can't tell you which products work best, but I recommend that you use the whitening products that you think are the best for you, and that you try them first.