Free shipping for all bundles.

Build your routine & save 33%

Duo is a line of superior toothpaste tablets formulated by actual dentists
Choose from Original, Immunity, Energy and Sleep
Tablets = NO plastic tubes + reduced water waste
100% guaranteed— return for a full refund if not satisfied.
  • All-natural
  • Dentist-made
  • Earth-friendly
  • Travel-ready
  • Whitening
  • All-natural
  • Dentist-made
  • Earth-friendly
  • Travel-ready
  • Whitening

Choose Your Combo

Choose from Original, Immunity, Energy and Sleep. (Learn more).

Duo Tip:

Add additional bottles if you want more supplements or you brush more than 2x/day


Pick Number of Bottles

Most people mix-n-match. Each bottle has 62 tablets or a 1-month supply when brushing 2x/day.

Duo Tip:

Add additional bottles if you want more supplements or you brush more than 2x/day


1-Time or Subscribe

Subscribe for an additional 10% savings while reducing your carbon footprint.

Why not every month?

By not delivering every month, we cut down on our carbon footprint.

100% guaranteed or full refund
better living through toothpaste

Mix and match from our award-winning family of functional toothpaste tablets to customize your daily Duo. Formulated by two dentists using the best clean ingredients, each variety has its own flavor profile and unique benefits.

nHa + antioxidants
vitamins D + B12
caffeine + B12
melatonin + L-theanine


Regular toothpaste is an environmental killer: 500 billion plastic toothpaste tubes end up in landfills each year. Tablets are the multitasking, planet-friendly upgrade. Free from sneaky ingredients and drying SLS foaming agents, our tablets come in glass bottles and compostable refill packets and are made with clean formulas that deliver whole-body benefits.

Nope! Supplements like vitamin D, vitamin B12, melatonin, and caffeine are absorbed into your system when they come into contact with the tissues in your mouth. This is called mucosal absorption. When you brush your teeth with Duo tablets, these supplements pass through your oral membrane and quickly reach your system.

We use a dentist-backed fluoride alternative called nano-hydroxyapatite (nHa), the natural mineral in your teeth and bones that combines with calcium and phosphate to make them strong. Exhaustive research over the past several decades has proven that nano-Hydroxyapatite is just as effective as fluoride at remineralizing teeth, while also whitening them and reducing sensitivity.

Duo is best experienced by mixing and matching the varieties that serve your health and wellness goals. As you find the routine that works best for you, you can customize your bundle by swapping out products. If you need refills for the guest bathroom, you can always add to your delivery.

Brightly whitens teeth

Strong enough to get out stains. Gentle enough to not strip enamel.


Vitamins C + E soothe and restore gums, nHa reduces sensitivity.

Vitamins and

Vitamins and supplements are absorbed while you brush.

Fights plaque
and free radicals

Removes build-up, neutralizes acid, and promotes good bacteria.

Loved and
recommended by
other dentists.

Plenty of foamy action, leaving your teeth feeling clean, fresh and polished all with the peace of mind of safe natural ingredients and a boosted benefit of vitamins and minerals. This is a tremendous product for all.

Kendra Melody, RDH

Duo is exciting for many reasons! nHA rebuilds, restores, and protects the enamel, while offering an alternative to traditional fluoride that also whitens and fights sensitivity.

Kelly Barbera, DMD

The Duo purpose of preventing cavities and sensitivity while simultaneously delivering functional ingredients through mucosal absorption is genius.

Hayley Sacks, DMD

Duo has me excited about brushing again. Thanks to the caffeine and melatonin, I have consolidated my morning and evening routines.

C. Johnston, DMD

The addition of vitamins and minerals is a unique idea that feels so intuitive for oral health! I am excited that each blend benefits my patients in a unique way!

Samantha Ward, DMD

Duo’s tablets are a quick, easy, and refreshing way to strengthen AND whiten my teeth.

Abby Yazback, DMD

we love our #duodiehard community