showed results of 3-4 shades after 2 weeks of use even though it was more expensive than the Vibrant White Pen. Tooth Sensitivity was a BIG problem when it came to the Whitestrips Premium Plus, the test subject reported tooth ache as well as the last 10 minutes of wearing the strips to be “painful”. The strips appeared to be messy to put on, as well as extremely difficult to keep in perfect form around the teeth. The strips only cover the front section of your mouth and therefore do not whiten the molars whatsoever. Staining of the hands when coming in contact with the strips is to be expected. I am not impressed that Crest advertises they can be easily used while in the shower or while driving a vehicle. Slurring of your speech makes it difficult to talk on the phone (also was advertised) and overall it was found to be difficult to multitask in any way, attention is needed to keep the strips in place and from folding up and getting gel all over your mouth.
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