Best Teeth Whitening Gels of 2025

"The first time I used this product, it worked incredibly well without causing any sensitivity, which is usually a problem for me with over-the-counter whitening products. What I like about this product is that it doesn't cause as much sensitivity and it only needs to be left on for a short period, which is convenient for use before bedtime. The first use showed a significant difference, but I didn't notice much change the second time. I plan to continue using this for over two weeks to see if it can whiten the area near my gums."

"I purchased this as a more affordable alternative to Crest 3D Whitestrips and I must say, it works just as well but at a much lower cost. It's very effective and although the instructions suggest leaving it on for 5 minutes, I usually leave it on for about 30 minutes for a more noticeable result. The only downside is that you need a gel mouth tray for it to work effectively. Applying it directly to the tooth doesn't work well as it comes off easily. When using the mouth tray, it can still leak out if you move your mouth or talk. Another drawback compared to the Whitestrips is that you can't talk or drink water while using this product. However, this minor inconvenience is worth it considering the product's affordability."

"What I love about this product is that it can be used alone or combined with toothpaste. Having the flexibility to choose how to use it is fantastic. I either use it after thoroughly brushing my teeth or mix it with my toothpaste. Of course, a single 5-minute session won't give you professional-level whitening, but with continued use, this product definitely works! My teeth are noticeably whiter, even with sporadic use. It's definitely a high-quality whitening gel."

"I've been using this product for five days, applying it with a silicone tray. It has already lightened my teeth by two shades. My teeth were fairly clean to begin with, but I wouldn't recommend this product for anyone with sensitive teeth. If used correctly, it doesn't cause any discomfort or burning sensation on the gums. I'm not a fan of an overly white smile as it can look unnatural, so I plan to stop using it in three days."

"I've tried various brands of teeth whitening gel and this one really works. My teeth had yellowed due to coffee consumption and past smoking habits. I've tried three different brands so far and this one is the best! After a month of treatment, using it three times a week, I can see a noticeable difference and I'm very pleased."

"This product was a great buy. It worked really well on my teeth. I recommend using teeth trays that you can mold to your teeth by dipping in hot water and biting down on. It's easy to apply a small amount of the gel onto the tray, put it in, and wait for 30 minutes. My teeth had regular stains and they whitened up quite nicely. The first time, I used a bit too much and experienced slight discomfort between my teeth. Now, I use it regularly to maintain the whiteness of my teeth. It's an excellent product for home use."

"Dentists approve of this product and for good reason - it works! If your teeth are naturally white, this product will enhance their whiteness just a bit, which is still noticeable. However, if you're aiming for a dazzling white smile, I'd recommend trying a stronger dose after the lowest one. I plan to upgrade once I've used up my current supply. If used correctly, this product will last you a while."

"I really like this whitener. My only issue is that it's quite thick and hard to spread accurately. So, I put it in a cup of hot water for a minute or two before I put it in my trays. I have permanent Invisalign retainers, so I use this in my Invisalign retainers and it works great. Some reviews prefer Crest White Strips, but I prefer this product because it whitens both the front and back of my teeth. I tend to accumulate more stains on the back of my teeth for some reason."

"My daughter's orthodontist recommended this product after her braces were removed. Applying a small amount every three nights and wearing the retainer overnight has made a significant difference. It's a bit pricey but worth every penny. So far, there have been no sensitivity issues with hot or cold food or drinks. This might be because only a small amount is used and it isn't applied daily. I'm very pleased with this product!"

"This is an excellent product. I initially bought it for my son and then for myself. You can see the difference after just one use. It doesn't cause any sensitivity for me, although I only use it for 10 minutes at a time. It does cause some drooling (at least for me), so be prepared to sit with a paper towel for 10 minutes. It's certainly worth it!"

"The product works. I've used two boxes so far and my teeth are getting whiter with each use. However, the second box caused some irritation to my gums, resulting in a burning sensation and turning them white. My gums were in significant pain. Rinsing my mouth with water didn't help much, but luckily the discomfort subsided after about an hour. I strongly recommend using the sensitivity gel that comes with it."

"This at-home teeth whitening product is very easy to use. I've used it a few times and have noticed some improvement. I'm confident that with continued use, I'll see a significant difference. I'm looking forward to continuing to use it. I highly recommend using the blue sensitivity gel, especially if you have sensitive teeth like mine."

"I bought this product based on the reviews and I'm glad it doesn't cause any sensitivity pain. I've been using it for about a week to treat my yellow stains and I can see a slight improvement. It's not a miracle worker, but it does work. The instructions are a bit unclear though, as they mention leaving it on for 30 seconds but don't specify whether to rinse afterwards. They only mention not eating for 30 minutes after application. So, I've developed my own routine of leaving it on for 10 minutes and rinsing at night. I'm cautious about not damaging my enamel, so I use it carefully. I would purchase it again."

"I bought this product hoping to whiten my teeth, as I've recently started drinking coffee and tea. It definitely works. I initially had trouble twisting the product to get it onto the brush, but once I figured it out, I was satisfied. It's very easy to use. After brushing your teeth, you dry them, swipe the gel over your teeth, and keep your teeth exposed for 30 seconds. The flavor of the gel isn't the best, but it's tolerable. I avoided eating for 30 minutes after application. My teeth are a bit whiter after each use."

"This product is very easy to apply and it works if you follow the instructions. My teeth have lightened by about two shades, although I use it sporadically. However, I had to take a break because some of my upper teeth became a little sensitive. I'm 61, so you need to be careful when using this product. It's safe, but it's important to use it as instructed."