Opalescence 20% 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

Been using this Opalescence 35% gel twice a week overnight in my Invisalign trays and—wow—this stuff works. As a card-carrying coffee addict, my teeth were starting to look a little too espresso-forward, but now they’re gleaming like I’ve never touched a latte.That said, 35% is no joke. Leaving it on for 10–12 hours definitely brings the brightness, but also brings the zing—hello sensitive teeth and slightly angry gums for a couple days. It’s like my mouth goes through a bit of a whitening boot camp, but hey, no pain, no pearly gain?Melon flavor is... interesting. Not bad, just kind of a weird moment when your mouth tastes like fruit salad while your teeth are turning snow-white.Would I do it again? Yep. Already did. Just maybe not right before a big bowl of ice cream.

Love this product! Recommended by my dentist. I leave them in all night a few times a month and never feel sensitivity pain like I do with other whiteners.

I have used this product in the past with good results.

works good enough

This is the stuff my dentist sold me when I got my teeth trays made. 35 percent works to gently clear away stains and yellowing. Its not a quick process, but if used consistently over 14 days you'll see whiter teeth.

Squirt in your retainer. Wear it all night. Our dentist recommended this and it works perfect. Extremely white teeth

The process works with patience.

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.