Because a whitening rinse is only in contact with the teeth for such a short time - just two.

BriteSmile® teeth whitening treatments take a little over 60 minutes from start to finish. The DaVinci Professional method is a non-dental, self administered process that provides you with professional guidance to safely instruct you through the teeth whitening process using our Professional Teeth Whitening System. It doesn't leave your breath as minty fresh and clean as a regular toothpaste would, and it feels grainy—like you can taste the hydrogen peroxide in it. But after I used it morning and night for four days, my teeth were noticeably whiter.

When choosing the best teeth whitening system for your needs, remember that though you might have to give up a morning or afternoon for a dentist's visit, an in-office treatment gives the fastest results. If you don't have the time to visit your dentist to obtain a prescription-strength gel, look no further than Colgate Optic White Toothbrush + Whitening Pen The gel takes only seconds to apply and adhere to your teeth. Using a whitening toothpaste or mouthwash, trying whitening pens, strips or trays are all good ways to supplement your normal oral hygiene habits.

The American Dental Association recommends seeing your dentist before you use any teeth whitening system. Using your custom-fitted whitening trays & our carefully engineered whitening gel to get the white smile you have always wanted. If you provide professional teeth whitening for your patients, you have probably found that some batches of whitening gels seem to work much better than others - even when using the same brand.

It seemed cheap and like it wasn't going to work, but it was truly convenient." Start to finish, whitening takes about 30 seconds: twist the end to release the gel and paint it on your teeth twice daily for seven days. So easy!" The lower peroxide level means it takes longer to see full results — 28 days compared to Glamorous White's 20 — which is something to keep in mind if you're whitening for an upcoming event. Crest's Gentle Routine has a lower concentration of hydrogen peroxide (only 3-7 percent) and require just five minutes of wear per day as opposed to 30. None of our testers experienced any sensitivity throughout their four-week testing period, but all reported some level of whitening and an appreciation for the lesser time commitment.

Only peroxides remove both surface and deep stains, whereas whitening products like toothpastes and gums can only target surface stains. Don't bother with a professionally-applied and over-the-counter products include a hand-held LED light or laser that claims to accelerate the teeth whitening process. The strips take 14 days to get full results (compared to Go Smile's seven) and require 30 minutes of wear time once a day.

We found which teeth whitening products capped their peroxide at 10 percent — the amount the ADA says is safe Fitbeauty365.com for over-the-counter use — then had 32 testers weigh in on their results.