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Original Whitening nHa Toothpaste

Plastic-free ● Fluoride-free ● SLS-Free

4.8
Rated 4.8 out of 5 stars
456 Reviews

Our signature tablet toothpaste features clean ingredients tested to be both safe and effective— including nano-Hydroxyapatite (nHa) for its remineralizing and plaque-fighting properties, as well as vitamins C + E to support periodontal health while soothing and restoring your gums. Featuring an all-natural wild mint medley flavor.

  • Naturally whitens without peroxides
  • Reduces tooth sensitivity without numbing agents
  • Dentist formulated for a healthy oral microbiome 
Your subcription will include 1 glass printed bottle that holds 62 tablets + compostable refill pouches.

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Inside the tablet

nano-hydroxyapatite (5% concentration)
remineralizes teeth
xylitol (birch extract)
promotes saliva production
calcium carbonate
natural polish
sodium bicarbonate
natural polish
cellulose
provides structure to tablets
xanthan gum
protects against dry mouth
magnesium stearate
vegetable-derived powder lubricant
hydrated silica
natural polish
menthol
cooling, soothing sensation
natural flavor
peppermint, wintergreen, spearmint
vitamin C, vitamin E
gum health

TOOTHPASTE HIGHLIGHTS

Naturally whitening
Anti-sensitivity
Sustainable + vegan
Hydrating, silky foam
Travel-friendly + mess-free

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Vegan

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SLS-Free

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Dentist Created

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Cruelty-free

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Non-Toxic

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Fluoride-free

“What you brush 
with matters.”

Tooth enamel cannot repair itself from within, which means your toothpaste has an important job to do. We packed Duo with proven ingredients like nHa to remineralize teeth and promote vibrant oral health. Developed by dentists, better for everyone.

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Dr. Stevie Roberts, DMD

Dr. Robert Johnson, DMD, MD

Clean Ingredients

Fluoride-free tablet toothpaste that strengthens & whitens teeth, reduces sensitivity without numbing agents and supports the oral microbiome.

Nano-hydroxyapatite

A dentist-backed fluoride alternative that whitens and remineralizes enamel.

Vitamins C + E

Synergistic antioxidants that support periodontal health and soothe and restore gums

Learn more about the science

How to brush with Duo tablet toothpaste

Crush a tablet between your teeth

Wet your toothbrush

Brush to activate foam

Rinse and smile

Plastic-free toothpaste made easy

Save up to 33% and lower your carbon footprint with subscription refills (in compostable pouches) delivered right on time.

ORDER YOUR REFILLS or build a custom bundle

Reviews

4.8
Rated 4.8 out of 5 stars
Based on 456 reviews
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456 reviews
  • JB
    Joelyn B.
    Verified Buyer
    Reviewing
    Immunity Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    3 minutes ago
    No more tubes. No more mess. Clean teeth, Fresh breath.

    I am far more scrupulous about product packaging than I used to be. Duo provides a great product (crunch, foam, brush, rinse, smile), in packaging that I believe is far more environmentally sustainable than plastic tubes.

    Was this helpful?
  • GB
    Gina B.
    Verified Buyer
    Reviewing
    Immunity Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Convenience and Earth friendly

    I just love these toothpaste tablets. They are so convenient....especially for as much travel as I do. I can take the whole bottle in my carry-on and have plenty for any trip I go on no matter how long I stay....and no mess. I use at home for my regular routine and have cut down almost completely on having any tube toothpaste waste. Am I getting sick less because of the immunity aspect? I dunno, but I figure everything helps! This is a different way of thinking about brushing your teeth, but I'm all in!

    Was this helpful?
  • CY
    Carrie Y.
    Verified Buyer
    Reviewing
    Original Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Duo is my only dentifrice!

    I tried Duo and never looked back. Convenient and effective tablets clean and preserve the integrity of my teeth. As an older woman I appreciate a product that stands up to the test.

    Was this helpful?
  • SJ
    sharon j.
    Verified Buyer
    Reviewing
    Original Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Duo toothpaste

    I love the refillable bottles and the quality of the little pills. So convenient and economical

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