Best Teeth Whitening Gel Review 2021

Teeth whitening gels are a great way to make your teeth whiter and look better. But you already know that. The main thing to remember is that the best whitening gel must be perfectly safe to use but still, provide amazing results.

At room temperature, they can be stored between 1 and 2 years (depends on a product). Purchasing those which have been stored for a longer period of time isn’t a wise decision. As such, we have found the best and the safest to use teeth whitening gels on the market. Let’s check them out.

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Best Whitening Gel Comparison

 BrandAmount Of GelIncluded In The PackageActive Whitening IngredientStoring PeriodApplication TimeWhitening Level
Active Wow Teeth Whitening - Premium Kit2 Syringes 5ml each- 2 Whitening Gels
- 2 Remineralization Gels
- 3 Teeth Trays
- 1 Whitening Accelerator Light
- 1 Tray Case
Hydrogen PeroxideN/A15 minutes/dayModerate to High
OPALESCENCE 35% MINT TEETH TOOTH WHITENING GEL4 Syringes 1.2ml each- 4 Whitening Gels35% Carbamide Peroxide18 Months30 minutes/dayHigh
RapidEffects Teeth Bleaching Whitening Gel Syringes2 Syringes 10ml each- 2 Whitening Gels35% Carbamide PeroxideN/A30 minutes/dayModerate to High
Optimized Strongest Professional Strength3 Syringes 10ml each- 3 Whitening Gels
- 2 Teeth Trays
44% Carbamide Peroxide12 Months30 minutes/dayHigh
Philips Zoom Whitening Nite White3 Syringes 2.4ml each- 3 Whitening Gels22% Carbamide Peroxide12-15 Months1-2 hours/dayModerate to High
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  1. Active Wow Teeth Whitening – Premium Kit

Active Wow is undoubtedly the best whitening gel you can possibly purchase today. It has been tested and approved by the government organizations and over time it has been used by thousands of people. All of them are satisfied with the results, which make it the best product here. Should you try it? Definitely yes.

An indirect advantage is the fact is that it is made in the United States. It simply means that the premium quality is guaranteed. We liked and appreciated the ingredients in this gel. Each one is specifically implemented in order to make the end result even better. Just to mention, in the kit you get all essentials needed for teeth whitening process: 2 clear whitening gel syringes, 2 blue gels (remineralization gels), both upper and lower trays, the case for the trays and light-activated accelerator.

LED Accelerator Light

The main things you will have to remember is that light-activated accelerator is stunning. It speeds up the process, so the first results are visible after just one treatment! At the moment, this is the most sophisticated technology regarding the teeth whitening techniques. Nevertheless, the gel is gentle, suitable for people with sensitive teeth and gums. We must add that the instructions are straightforward and easy to follow, which isn’t situation with all teeth whitening gels. That’s why we advise first-time users to start with this gel.

A treatment requires between 10 and 20 minutes, although the best time is around 15 minutes. You will have plenty of gel to complete several treatments until your teeth are perfectly white. Another benefit of this gel is the old stain removal feature. Stains from coffee, cigarettes, wine and food will be removed alongside the yellow color of the teeth.


  • Great package with all essentials included
  • Removes old stains
  • The first result is visible after just one treatment
  • Light-activated accelerator is superb
  • Safe to use
  • Not too expensive for what you get in the package

  • It might happen that mouth piece doesn’t fit perfectly[/one_half_last][divider style=’centered’]

Here is the second-best teeth whitening gel on the market. It is a member of latest generation products, so it truly has plenty of advantages to offer. Probably the most important one is in the active ingredients, which are chosen to protect and restore the health of the teeth. We appreciate the Carbamide Peroxide, Fluoride and Potassium Nitrate. Combined, they make a huge difference in the speed of the entire process and on the visible results. Expect visible changes after a few treatments and expect stronger teeth.

Now, the time is to mention why this is one of the most popular products at the moment. First of all, the new formula reduces sensitivity, which is just perfect for individuals with this issue. It has been tested and it really works, meaning that now all of us have an opportunity to make our teeth whiter! The shelf life is longer than on some units. It is 18 months, during which all the ingredients will stay perfectly active and maintain all of their benefits. Keep in mind that this is not a large package as the previous one, but it isn’t possible to spend it as easy as you would believe. Even if you do, the price is affordable, so purchasing another one, when the time is right isn’t such a big deal.

Each treatment takes 30 minutes. During that time, you will have to use mouth pieces which are perfectly shaped for the curvature of your teeth. In most situations, this is the mandatory element of the entire process. We were very satisfied with the end result after few days.


  • Shelf life is up to 18 months
  • Reduces sensitivity
  • Fast first results
  • Large package
  • Value for money
  • Mouth pieces are excellent[/one_half_first][one_half_last]Cons:
    • You must keep it for 30 minutes
    • Isn’t so sensitive for the gums
    • Product could be better packed
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  1. RapidEffects Teeth Bleaching Whitening, 35% Gel Syringes

Rapid Effect does precisely what the title suggests. It is a fast-acting teeth whitening gel with a peroxide-based formula which removes stains as soon as possible. Let’s just mention that even the oldest stains will be removed.

10 ml Whitening Gel

High viscosity formula brings to us another great benefit. It eliminates the tray slipping from the teeth, making the entire effect much better and easier, obviously. You won’t have to re-adjust the trays and once placed, they will stay as long as needed.

In reality, this gel has more than 60 applications. It is a versatile solution, recommended by dentists all over the world. 10ml syringes are something we must mention as well. They are large, much larger than most other products have to offer. As you would expect, this makes the entire product better value for money and allows you to have plenty of gel to use as long as all the stains are removed.

Instructions are common with these products, but not all of them are actually useful. You definitely won’t have any issues with the Rapid Effect. All the guidelines are displayed and easy to interpret. Regardless is this your first time to use a teeth whitening gel or you have a long experience, the complete process is as simple as possible.


  • Over 60 applications
  • Large syringes
  • Fast and effective
  • Simple instructions
  • High viscosity formula eliminates slipping of the trays

  • Syringes don’t have practical tip
  • Less effective than other products here
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  1. Optimized 44% Strongest Professional Strength Carbamide Peroxide Teeth Whitening Gel Syringe Kit

More than just affordable, yet more than just powerful are the main facts regarding this teeth whitening gel. It isn’t conventional product of this kind. It has been developed to provide maximal efficiency and even better strength than most types. According to our results, this actually works. The formula is stable, high viscosity as the aforementioned product has and it has been used by actual dentists.

One of the things that caught our eye and probably will yours as well are the teeth trays. They are larger than most of other you can get and they have an extension which makes placing and removing them as easy as possible. Besides the ultimate strength, this is a gentle gel thanks to Carbamide Peroxide ingredient. If used correctly, the formula in question is suitable for sensitive teeth and it won’t damage your gums.

Large 10 ml Syringe

The bottom line, when it comes to this teeth whitening gel is that you are going to like it! The efficiency is at the highest level, the quality of the product and the kit overall is exceptional and the price is more than just affordable. All of you who are looking for a great alternative on a budget should consider Optimized 44% Strongest Professional Strength teeth whitening gel.


  • Superior trays for holding gel
  • Made in the United States
  • More than just affordable
  • Powerful formula

  • If put larger amounts of gel can damage the mucosa of the mouth
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  1. Philips Zoom Whitening (Nite White 22%, 3 syringes)

Get your teeth whiter in just one day. It is actually possible if you use Zoom Whitening gel. It is one of a kind on the market today and it will stay like that in the future. First and foremost, the Amorphous Calcium Phosphate (ACP) formula is magnificent. You won’t only get teeth stains removed, but also the health of the teeth restored. These substances repair enamel, they protect the teeth and they remove sensitivity issues at the same time. All of you who have issues with other products of this kind should consider this one!

The expiration time is between 12 and 15 months, which is just right. If we add the facts that dentists use and recommend this gel and that over 10 million people already tried it and they claim it works perfectly, we can deduce that this is the best whitening gel which also brings a set of advantages, compared to other products. One, minor yet noticeable advantage is the effect on the teeth smoothness. In simple words, the teeth will be smoother making the smile even better.

Made by professionals, used by the best dentists in the world and recommended by millions of people should be plenty of facts why we liked this product. You are definitely going to change the appearance of your teeth and finally get a perfect smile. At the same time, the teeth will become stronger, stains removed completely and sensitivity reduced. Even better, all of this is possible within just one day!


  • Used and approved by 10 million people
  • Long expiration date
  • ACP (amorphous calcium phosphate) formula
  • Very strong and quick[/one_half_first][one_half_last]Cons:
    • Complicated to apply to a tray
    • Must be worn for 2 hours
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Related Products

Some of the other products you may like to consider are teeth whitening strips or top whitening toothpastes. For best oral health it is recommended to use electric toothbrushes and water flossers. Adding best whitening mouthwash to the mix will give even better whitening results. To fix small teeth discolorations choose one of the whitening pens from our best teeth whitening pen review.

If you are looking for affordable and efficient solution to enhance the brightness of your smile, you can’t go wrong with a Supersmile toothpaste.


The best whitening gel is Active Wow, obviously. It truly brings the most advantages and important features of the process, but it doesn’t have severe drawbacks. It is safe to use, quick and effective. We highly recommend it and we hope you will get the desired effect within a short period of time. Philips Zoom and Opalescence 35% are great as well. They are superb for individuals with sensitive teeth and for those who are open to trying something new. You won’t make a mistake if you try them, and chances are high you will continue using one or both of them.