Snow teeth whitening

Our verdict

Snow is a convenient way to use a peroxide whitening serum, but you pay for packaging and an LED mouthpiece whose light has little evidence behind it. Paint-on gels have whitened less than whitening strips in head-to-head trials, and Snow doesn't publish its peroxide strength, so you can't compare it directly with products that do. If you want a predictable result, ask your dentist about custom trays, or look for a product that carries the American Dental Association's Seal of Acceptance. If you like Snow's format, the 30-day money-back guarantee lowers the risk of trying it. If you subscribe, refills come every one, two or three months, so skip deliveries you won't use.

Which Snow kit is which

On October 29, 2026, Snow's website sold two main kits. Each pairs a three-pen pack with an LED mouthpiece that plugs into a phone or USB port. Each kit can be bought once or by subscription. On a subscription the mouthpiece ships only with the first order, and refills contain pens only.

Snow's older DiamondSeries kits, including the wireless kit with a UV case, are still sold by some other retailers. Snow's own DiamondSeries page now shows the Sensitive kit. The photo on this page, from our 2020 review, shows an earlier corded kit.

What is in the serums

Both pens list hydrogen peroxide and carbamide peroxide, which do the whitening; potassium nitrate, a common ingredient for sensitivity; and hydroxyapatite. Carbamide peroxide releases hydrogen peroxide as it breaks down. Snow doesn't publish the strength of either pen, only that the Extra Strength pen is its strongest serum. Snow's FAQ notes that the FDA does not approve individual whitening products, and says Snow does not have the ADA Seal.

What the evidence says about the serum

Peroxide whitening at home works. A 2018 Cochrane review of 71 trials found that home bleaching products, including paint-on gels, whitened teeth more than placebo over two weeks to six months, though the certainty of the evidence was low to very low, and it couldn't say which product, strength, or method is best. Two small head-to-head trials, from 2003 and 2007, found paint-on peroxide gels whitened less than whitening strips. We found no published independent trial of Snow's serums.

What the evidence says about the LED light

A 2019 network meta-analysis of 28 trials of in-office whitening found no light-activation system that improved color change, at high or low peroxide strengths. An earlier review found that light activation increased the risk of tooth sensitivity, with a possible short-term benefit only at 15% to 20% hydrogen peroxide. Those trials used professional lights; we found no independent trials of home LED mouthpieces. Snow's FAQ lists its light as under 1 watt, with blue at 460 to 462 nm and red at 620 to 625 nm, and says red light kills bacteria and reduces inflammation. We haven't seen evidence for that claim in a whitening device.

So the peroxide is the part of Snow with evidence that it whitens teeth. Trials of professional lights didn't show a benefit, and we found no independent trial of Snow's mouthpiece, so whether its light adds anything is unknown rather than disproved.

Which instructions apply to which kit

Snow's website carries instructions for its current kits and for older ones, and most of the differences come from that. The overnight serum and the 9 to 30 minute LED session are separate steps, not competing timings.

For the current kits, two things are unclear. Snow's general FAQ answer on how often to whiten, which doesn't name a kit, says 9 to 30 minutes a day for 21 to 30 days, with a one to three day break if you get sensitivity, while the Extra Strength kit page says 21 days. And the Sensitive kit page doesn't say how many nights to use the Overnight pen or how often to do daytime LED sessions. Follow the leaflet that comes with your kit. If there isn't one, or you have an older kit bought from another retailer, ask Snow for the instructions for that exact kit before you start. Stop and see a dentist if you get pain or sensitivity that doesn't settle.

On age, the kit pages say the pens are for ages 12 and up and the mouthpiece for adults 18 and up. Snow's FAQ says its products are designed for adults and that anyone 12 to 17 should consult a dentist first.

What it costs

These are the prices on Snow's two kit pages on October 29, 2026; both kits were priced the same. Snow shows each price beside a crossed-out $98, which it calls the kit's value: the $59 it lists for the three-pen pack plus the $39 it lists for the mouthpiece. That figure is Snow's reference value, not a price you pay.

Snow presents both prices as savings against the $98 figure and gives no end date, so check the total at checkout. Subscriptions ship free, and one-time orders over $60 ship free. Prices exclude any sales tax.

These totals assume the prices don't change and no delivery is skipped. Snow says a three-pen pack is about 90 treatments. Its Extra Strength directions drop to two or three sessions a week after the first 21 days, so on a subscription pens can arrive faster than you use them; skipping a delivery from your account avoids paying for pens you don't need. Single pens were listed at $39.

Guarantee and returns

Snow offers a 30-day money-back guarantee on purchases from its own site, for US customers. The guarantee page counts the 30 days from delivery, but Snow's terms of service count them from shipment, so make any claim early. For serums you don't need to send anything back; for an opened or used LED device you don't either, while an unopened device must be returned with a prepaid label. Original shipping charges aren't refunded. Snow says it handles returns only for orders from its own site, Indiegogo, and Amazon; other retailers handle their own. The mouthpiece electronics have a 2-year warranty, according to Snow's FAQ.

During aligner treatment

Check with the dentist or orthodontist supervising your treatment before you whiten. Tooth-colored attachments bonded to your teeth won't change color, and Snow says the same about fillings, crowns, and veneers, so you may want to wait until the attachments come off.

Don't put Snow serum inside your aligners; they aren't designed as whitening trays.

Our guide to teeth whitening compares in-office, take-home, and over-the-counter options.

How this review was put together

This review first appeared on Aligners.co in July 2020, and the photo is from that review. The original repeated customer numbers and a satisfaction rating from Snow's website and compared Snow with dentist whitening on price; those figures are Snow's own and haven't been carried over. This update is based on Snow's current product pages, FAQs, guarantee, and terms, ADA guidance, and published systematic reviews and trials, checked on October 28 and 29, 2026. We didn't test Snow products, and the page hasn't been clinically reviewed.