Opalescence PF 20% Teeth Whitening 8pk of Mint flavor syringes

I purchased trays and Opalescence 20% whitening gel from my dentist. My instructions were to apply the gel to the trays (sparingly) and then wear the trays for 90 minutes a day for two weeks without skipping days. My teeth are no longer yellow. The product works. I did experience some discomfort and sensitivity around my gum line and in my teeth but it is nothing that is intolerable. I would not try a stronger strength of the gel. My dentist gave me a toothpaste to use to help with the sensitivity and it has helped. I believe it is important to follow the instructions of the dentist with regard to the amount of gel that is applied to the whitening trays. A little does go a long way and too much causes unnecessary discomfort to the gums. The product and this method of tooth whitening is effective but you need to be patient and diligent. I purchased more gel for future touch ups from an Amazon.com vendor because it was more cost effective than purchasing more gel from the...Read more

Once you've got your own trays, the Opalescence PF 20% teeth whitening syringes are very quick & easy to use. They also work. I used my trays for 2-3 hours per day for 3 days. After that, I left them in all night. Very little sensitivity (I did skip a day after each all night use). And the results are very noticeable. I will definitely use the product again in another 6 months or so.

The product came with an expiration date of 2008. The gel still works, but takes longer than the gel I bought at the dentist's office with an advanced date of expiration.