Do you have to buy whitening gel from the dentist? Many people wonder if they can get the same results from over-the-counter whitening gels as they would from professional treatments. The answer is, it depends.
Over-the-counter whitening gels typically contain lower concentrations of hydrogen peroxide than professional treatments. This means that they may take longer to produce results and may not be as effective. However, they are also less expensive and can be more convenient.
