Opalescence20% with PF Whitening Whitening Refill Kit (4 Packs / 8 Syringes) Carbamide Peroxide. Made by Ultradent, in Melon Flavor. Tooth Whitening Refill Syringes - B-5401-4

Keeps your teeth whitened without looking neon

Happy with whitening, but get custom trays and just dab a small bead. You dont need too much

Opalescence is a super effective brand. Will whiten your teeth several shades with little to no sensitivity. It is however very irritating to the gums. I find that this flavor burns my gums significantly less than the mint versions. Def recommend.

Awesome white teeth. May cause sensitivity so don’t use this consecutive days.

I ordered an 8pk of Opalescence from seller; product arrived timely and I am happy with product.For those using 15%- you may want to try the 20%- works just about the same- the 5% didn't seem to make much of a difference; however, I would like to comment on teeth sensitivity.If you have sensitive teeth, you may want to continue using what your dentist recommends.

Whitens really well - much better than strips. You do need to get trays; I had some custom made at the dentist and use the product about once every three weeks to maintain my desired level of whiteness.

It does work somewhat as far as whitening but as soon as I put it on with my Invisalign there was a foaming crackling sound and it was super uncomfortable and I wanted to take off the retainer straight away but I barreled through. Taking it off 25 min later I see my gums are white, swollen, and irritated. Probably won't get this strength again !

I needed more so I ordered online & was a little anxious of it but they were all sealed well, just like I would get from my dentist. The 35% whitened in a few hours.