Review (1/5): Ultradent only sells to licensed dentists, so these products ...
Ultradent only sells to licensed dentists, so these products being sold online have unknown sources.
These items are not supposed to be sold directly to consumer for safety reasons.
Here is a written statement I received from Ultradent:
"Ultradent only sells its Opalescence products directly to dental professionals in the United States."
...
"Thus, while it may appear that these third parties are selling the products for a lower price, the item you actually receive may not include the entire
product, may contain counterfeit or fraudulent product, may not contain complete instructions and accessories for safe and effective use, and/or may contain product that has lost its efficacy."