Teeth Whitening Gel Refill 4X Syringes 35% Carbamide Peroxide

After using Dr. Song's teeth whitening for more than 2 years I finally take the time to give them a well-deserved review. Their kit of <35% carbamide peroxide + light + little applicator brush> is all you need to safely whiten your teeth at home. I first did an "intensive" whitening with daily use until the desired color, and then every now and again for maintenance. This kit costs a fraction of what it would cost to have it done at a dental office. Also, a competitive price compared to all the other home-whitening kits out there that charge you much more for the same results in a fancier package.After several purchases I can tell: It always delivers promptly, is well packaged, and syringes with carbamide come in a bag with an expiration date (this is important as carbamide peroxide will expire and stop working). The product works just as promised. I personally have not had any teeth sensitivity with repeated use. But I think people prone to teeth sensitivity might want to space the treatments to every other day or more.Do not look any further. You are buying a very good product at a great price!

I really like the formulation of this product, for the price point. Works great, it gave me some sensitivity but an equal amount to a 2% Hydrogen peroxide whiting gel I've tried before, which is amazing for the strength of the product (if sensitivity is a concern, get some teeth remineralization gel such as the one from Hismile or products that contains potassium nitrate such as Sensodyne products to reduce sensitivity). Carbamide peroxide is a great ingredient because it continues to work even after absorption into the enamel, unlike hydrogen peroxide (I do my research). I also really like the company as well, in my latest purchase, they even put in an extra whitening syringe as well as a teeth shade chart to track progress.

I'd like to give this a 5 star rating, but have to take off a star due to packaging. The product itself works, just like any other 35% solution (most of which are much more expensive). I have regular trays (not the light activated ones), used this for 10 minutes the first time, and saw significant improvement! I generally use 35% solution for 3-4 days consecutively, then I'm good for at least a month or 2. I've done 2 treatments and still have about 25-30% of a syringe left, so a little goes a long way.My complaint is in the packaging. The only thing telling you what this product is is a sticker on the box. The syringes aren't labeled, there isn't an "ingredient list" type of thing inside the box. This doesn't really inspire confidence in the product. The instruction sheet provided is only for a light activated tray, so I had to do some additional research to make sure this would work in regular trays. Finally, the syringes don't move really smooth. You need to use a little pressure, and then Splat! A whole blob comes out at once. Luckily, they include a tiny brush, which I then used to spread the blob around the tray, and transfer some over to the other tray. This has happened both times.The taste is horrible, but I'm not faulting Dr. Song for this, since every bleach I've used tastes horrible.

I used to have a gel similar to this one and I haven't liked any other ones I have tried since.Pro: The gel is strong so it whitens your teeth in 20-30 minutes. Also no sensitivity! I have pretty sensitive teeth and can't do dental office whitening. This is much more gentle but obviously you will need to repeat a few times to get similar results. It's nice that I can breathe on my teeth the next day and not get zingers. As a matter of fact I bleached two days in a row so far without sensitivity.Con: As others have mentioned the tip is designed poorly. You have to be very very gentle when dispensing the gel. You only need one little dot on each tooth inside a whitening tray. Even then I got an overflow out it the tray onto my gums which I brushed away the excess and had no gum bleaching.You do definitely need a tray to use this product especially that it's so strong. You don't want it to get everywhere. I used my Invisalign trays.I hope they keep the price reasonable as they get more reviews. This gel well last me a long while though as I only bleach for special occasions.

Dr. Songs Teeth Whitening Gel does work as promised. It does whiten with about as well as Opalescence 35%. However, the packaging of the product leaves a bit to be desired.I have custom molded teeth trays I got from my dentist a few years back. The teeth trays have small, molded pockets to hold the gel on the front of each tooth. I have used Opalescence every few months for a "touch up" of my teeth.The syringes for Dr Song's gel are larger than Opalescence and have more gel but there is no pointed tip for accurate placement of the gel. Also, even though I put the cap back on the Song's gel, it seems to coagulate a little in the tip between uses. Every time I use the syringe the first bit of produce gushes out into the teeth tray. I then have to push the extra gel around with the syringe tip to try to distribute it to the other teeth pockets. The bottom line is I use much more gel with each use so the extra gel in the syringe is really not netting more uses.It may be that Dr Song's get is really made for generic teeth trays which would probably need more gel since they are not custom molded. Perhaps if Dr Song's included a pointed tip you could attach to the syringe it would work better for me. The Dr Song's gel does work but I will probably go back to the Opalescence after I use up the Dr Son'g syringes I have.