Teeth Whitening Gel Refill 4X Syringes 44% Carbamide Peroxide

High-strength. To be used to obtain rapid results, and for those who need whitening more than a few levels.Many other brands on Amazon do not specify what strength their carbamide peroxide whitening gel is.That's a red flag in my opinion. The weaker the gel, the more you must use in order to get the desired results (especially if, as I said, you have deeper staining).I saw noticeable results after 1 use, and even more of a stark, positive difference after the 2nd application.For best results, apply the gel after brushing your teeth, and gently drying your teeth with a tissue, cotton ball, or cotton swabs.Then, apply the gel in a moderately-thick layer on each tooth. Be sure to apply some to any crevices between your teeth. You can also apply it to the biting/chewing surfaces of your teeth near the front (canines and molars) if you desire whitening there.Then, use your mouth guard, or mouth guard and attached LED blue light (I used a mouth guard with LED blue light I had from another kit).That other kit I purchased from Amazon (a different brand/company from this one) was great. The exception is that the carbamide peroxide was weak, and I would end up taking a long time to whiten my teeth (weeks instead of days).Plus, when makers do that (produce a weak gel), they cause consumers to buy more of it to get the whitening level they seek. It's a waste of money.I suggest buying a STRONG gel to begin with of 22% or 35% carbamide peroxide to start, and if you have no sensitivity issues, continue to use that, and use whenever you need a touch-up.I went to 44% after using 22% and 35% over the years (as well as having tried Crest White Strips, professional whitening strips, and over-the-counter (in store) whitening pens).I highly recommend this gel. Only use it if you have no problems with sensitivity, burning, soreness, allergies, and/or adverse reactions with your gums, lips, or inner buccal cavity (inside of the cheeks). I have not had any problems with that so far.My teeth look and feel great after using this! I am a black tea drinker (and occasionally, coffee and red wine). I also use lots of potent spices that can stain teeth (and also fabrics) in my cooking and daily meals (like turmeric, chili powder, cayenne powder, cumin, mace, paprika, Etc).This gel will be my go-to from now on as long as they continue to sell it! The price point is very, very good. There are much weaker strengths of whitening gels in the Amazon market that cost considerably more.The fast and significant whitening that this gel by Zero Glow offers gives a person more bang for their buck.★ NOTE: Please remember to store your unused peroxide gel in the refrigerator to prevent degradation and weakening due to ambient temperature changes in your home or office. It is not advisable to freeze it from what I have read over the years.★ Disclaimer: This is a review that is *WITHOUT* any coaxing, promotional incentives, affiliate discounts, business contracts, social media influencer advertising, requests by the company to leave a review, and commissions.I am a regular Amazon Prime customer who shops often due to the deals I find on Amazon as compared to in [brick and mortar] stores.I do not leave reviews on items often, but I felt this product deserved a great review due to others rating it lower than I feel it should be.Zero Glow deserves at least a 4-star rating minimum, and I'm very happy with their product.

Very impressed with this stuff! I've used teeth whitening gel before but I ran out and decided to give this stuff a goal not only did they give me an extra syringe! But after two times I already noticed a huge difference!!! Will definitely buy again! The first picture is the before, the second is after two uses.I brush my teeth first, and then use a q-tip to dry them off, I then use the little brush that comes with to paint the gel on and I have a mouth guard with a blue light from a previous kit that I use. This company sells a kit that comes with the mouth guard and light that I would recommend getting it's super cheap! My battery is starting to go dead on my original one so I will probably purchase another one from these guys

This whitener helps some, but is not great.

It works, no sensitivity.

Didn't buy mouth guard. Brushed my teeth with toothpaste, then rinsed my mouth. Put whitener on toothbrush, brushed my teeth. Held product in mouth 5 minutes. Rinsed mouth. Brushed my teeth used mouth wash. My teeth were visiblably whiter. I mean they give you a guide and mine must have whitened 3 or 4 shades. Will keep buying but will also buy a mouth guard, it seems easier that way. Excellent product. Actually does what they say it does and at a great price. If I'd known I would have done a video.

I received this today. I used the color wheel to see how badly stained my teeth were. I was at 17. I placed the product in the teeth trays (which was easy to do) and left it on my teeth for about 30 minutes. I checked the color wheel again and my teeth had brightened to 16. The taste was fine. I was not sensitive at all. No burning. I will definitely keep using and buying!

Product works good but my last order they were not filled all the way and there was black pieces in the solution.

I love this product. Packaging came sealed and no damage was done while in transit. I pair it with a blue light that I already have and it does the job! I get so many compliments when I do a treatment. I recommend this item.