Crest3D Whitestrips Age Renew – Teeth Whitening Kit, 21 Treatments, Each with 1 Upper/1Lower, 42 Strips – Crest 3DWhite Teeth Whitening Strips

Very happy with these White Strips!!! I ran dental offices for years, and have used custom trays and bought the gel from the dentist. These are better. They stick and don't move around. You don't even know they are on. One hour a day and in two weeks amazing results. I am so happy with this purchase and give them a must have if you are wanting to bleach your teeth with no sensitivity and results!!!

These are without a doubt the most whitening/brightening whitestrips I've ever used. The strips are so uniform and the whitening ingredients are so well spread onto the strips it's crystal clear.I've been using crest whitestrips for 14-15 years now. I started all the way back before the non-slip was even invented and you'd have to just kinda bite down on your teeth to prevent them from sliding around. They've been VERY effective in the past, which is why I've continued to use them throughout the years, but this pack right here is the most effective one I've ever used. I'm only halfway done with the set but my teeth are OUTLANDISHLY white. I started getting compliments from coworkers my 3rd day in. I did some research after buying them because I wanted to know what made these different, and it turns out it has the highest hydrogen peroxide concentration from all other strips out there. Their other strips contain 3.5%, 8% etc, this one's supplying the highest concentration you can get. I will say, if you're new to whitestrips they work by oxidizing the surface of the tooth to remove the stains soaked into the teeth. It's enamal safe, but you'll notice sensitivity. By day 5 I had to go out and get some sensodyne . If you're having sensitivity issues, I recommend getting sensydne and when you go to brush your teeth, spit out the toothpaste, not rinse. When you go to bed, brush softly and spit out the toothpaste, go right to bed and the floride toothpaste will help stick to your teeth and stop that sensitivity.

I’ve had decades of smoking and coffee drinking, my teeth were yellowing and I was getting self-conscious of my smile. I tried everything else: whitening toothpaste, gel that goes in a tray in your mouth with a light, and several other, cheaper whitening strips. By the time I add all those products up, I would’ve saved money if I had just taken the plunge and gotten these. After the 2nd treatment I noticed a difference. I’m on treatment 6 now, and continue to actually be able to see the difference this is making. I had a little teeth sensitivity, but not bad at all. I’ve been told that genetically, I have good teeth. Never a cavity or any issues, so I’m assuming that plays a part in not really having sensitivity with these. I have never used these strips before so I am cutting them in half long ways, to get more treatments out of them. I also prefer how it fits on my teeth that way. When I apply them I do run my finger over each tooth to make sure everything is fully covered. I am so glad I finally spent the money to try these and have learned my lesson. No more cheap, knock off stuff for teeth whitening, I will stay with Crest white strips from now on!

This product does work, so that's great. Your teeth will be whiter. As you can see in my before-and-after photos, my teeth were pretty yellow. I was very self-conscious about smiling, but now I'm not. So that's amazing. However, for a product that claims to make your teeth 28 levels brighter, and make them "supremely white," I don't know if it quite delivers on that. I also am not sure how long my teeth will stay white for, because I am writing this review quickly after using up the whole container of strips. The product description says this should only be used once per year, but who knows if my teeth will stay white for a whole year.I have heard from other sources online that this type of product works better on someone who is a teenager or in their early twenties. I am in my early thirties.Keep in mind that your teeth will be sensitive and in some pain for maybe about 12 hours after each time you use the product. It's not unbearable, but it is annoying, and you will have to get used to it until the end of the month when you have used up all the strips.

Works easily to whiten my teeth

This comment is my opinion only. I cannot trust Crest anymore. These strips are identical as the ones I just returned, same strip sleeve with identical wording, front and back, as the "19 Levels" except for 1 exception: Keep them on for 60 minutes as opposed to 45 minutes. Are you kidding me? No mentions of the "25 Levels" anywhere on the strips except on the outer box. This is seriously misleading and I will never buy their products again.

Great products I will always go back to these! I did have some sensitivity, but used a sensitivity toothpaste to help. I saw a difference after one use.

I wish I took before and after pictures these work great I missed one or two days, but I would just continue the day after and I could see a huge difference in the brightness of my teeth. Make sure you drink enough water and you will see a huge difference. It definitely wants a teeth. I haven’t felt any sensitivity. I haven’t felt any discomfort and I am very pleased with this product. I throughout this the box, but they were great.