Oral care
3D Whitestrips Age Renew At-Home Teeth Whitening Kit — 21 Treatments
Reviews
3.4/ 5
Brand Crest
- 5 stars 5
- 4 stars 2
- 3 stars 0
- 2 stars 0
- 1 star 4
Product description
What’s included: a 21-treatment course of adhesive whitening strips designed for at-home use. Each treatment contains paired strips for upper and lower teeth, sized to cover typical front-tooth surfaces and accommodate varied tooth shapes.
Ingredients & safety: the formula relies on a peroxide-based whitening agent—the same active ingredient found in professional treatments—formulated for enamel safety when used as directed. The strips are made with a flexible film that holds the whitening gel against the tooth surface.
Fit & technology: strips come in matching upper and lower sizes with an advanced seal adhesive that helps prevent slipping during the full wear period. The seal is intended to keep the gel in contact with teeth so you can talk or move without constant readjusting.
How to use: apply to clean, dry teeth, press along the gum line to secure, and wear for the recommended daily time shown in the package instructions. Remove after the indicated wear period and discard. Continue the daily applications for the full 21-treatment course for maximum effect.
Expected results: the manufacturer positions the kit to remove years of surface staining and achieve multiple shade levels of whitening over the treatment regimen. Individual results, duration of whitening, and sensitivity will vary depending on diet, oral habits, and tooth age.
Pros
- Dentist-grade peroxide formula
- No-slip adhesive keeps strips in place
- Noticeable results in a few days for many users
Cons
- Some users report tooth or gum sensitivity
- Results and longevity vary by person
- Occasional fit or peeling issues reported
VerdictThis 21-treatment kit delivers noticeable whitening for many users, often within days, using a dentist-grade peroxide formula and a no-slip adhesive. It’s effective at reducing long-standing stains, but some people experience temporary sensitivity or gum irritation. If you want professional-strength results at home and follow the directions closely, it’s a strong option — but expect outcomes and c
Reviews
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Giovanna 1/5
Very abrasive and caused strong tooth pain
I used them for just two days and experienced intense tooth pain. Not recommended—very abrasive on my teeth.
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Lisa Eagen 1/5
Very disappointed — dried out and caused sores
The strips became unusually dry while on my teeth and were difficult to peel off after the wear time. After two treatments where strips overlapped I developed sore spots on my gums. I’m very disappointed given my expectations.
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Connie Wright 5/5
Effective but removal can be tricky
They delivered on whitening—my stains faded. Application is simple if you follow directions. So far the claim about long-lasting protection seems to hold. The only hassle was removing the lower strip, which was a bit stubborn for me.
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Rosie 5/5
So white! Managed initial sensitivity
Amazing results. Early uses caused sharp pain in my two front teeth about 20 minutes in, so I had to stop at first. Switching to a sensitive toothpaste helped a lot. After nearly daily use for a week my teeth are shockingly white. I’ll repurchase for maintenance.
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Bryzzo 5/5
Huge difference — Whiter than dental cleanings
These strips surprised me. After about a week my teeth looked dramatically whiter—clearer than after my professional cleanings. Highlights: fast visible change in days, no sensitivity for me, stayed put while I moved around, and felt like a pro-level whitening without a dental visit. I’d tried other options and none matched this.
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Fit4Life 5/5
Truly effective — better than in-office option I tried
My before-and-after is impressive. I did an in-office whitening once and found it expensive, painful, and less effective than these strips. I’ve received many compliments and even my dentist couldn’t match the shade with a crown. Highly recommend for visible results.
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Esbeidy 1/5
Arrived damaged with broken seals
Both boxes I received were opened and torn, and the safety seals were broken on each. Very dissatisfied with the condition they arrived in.
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Jeffrey 5/5
Most effective of the ones I've tried
I’ve used this brand for over a decade, back when strips didn’t have non-slip tech. This batch stands out: very uniform gel coverage and impressive whitening. I’m only halfway through and already getting compliments. Apparently this formula has a higher peroxide level than many alternatives, which seems to explain the dramatic change.
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Madison Squirrel 4/5
Works — but not 28 shades brighter
The strips made my teeth visibly whiter and helped my confidence—my before-and-after photos show a clear improvement. That said, the claim about 28 shade levels felt exaggerated. I’m unsure how long the whitening will last; I used the full kit and am writing shortly after finishing it. Expect some post-treatment sensitivity for a day or so.
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Alejandro R 4/5
Others noticed the change even if I didn't
I didn’t observe a big difference myself, but people I know commented that my teeth looked whiter, so I believe it worked.
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Javier 1/5
Doesn't deliver on promises
I followed the instructions exactly and saw minimal whitening. It also irritated my gums. Not what was advertised.
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