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Original Compostable Refill

WHITENING TOOTHPASTE

4.8
Rated 4.8 out of 5 stars
410 Reviews

 

Our core formula is crafted for optimal oral and whole-body health. Duo Original is packed with rigorously tested clean ingredients including nHa (a dentist-approved fluoride alternative) and vitamins C + E to whiten, remineralize and reduce sensitivity. Made with only the cleanest ingredients, Original is the baseline for all our tablets, so no matter how you do Duo, you can brush with confidence.


Your subcription will include 1 glass printed bottle that holds 62 tablets + compostable refill pouches.

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Inside the tablet

nano-hydroxyapatite
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
stevia leaf extract
cavity-fighting plant extract

A higher standard

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

Dentist-recommended antioxidants and botanicals to restore and whiten enamel, soothe sensitivity, and balance 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

Crush a tablet between your teeth

Wet your toothbrush

Brush to activate foam

Rinse and smile

Plastic-free made easy

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

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Reviews

4.8
Rated 4.8 out of 5 stars
Based on 410 reviews
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410 reviews
  • CH
    Carol H.
    Verified Buyer
    Reviewing
    Original + 3 Bundle
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    Good for your teeth and good for the environment

    I've been using these Duo tablets for a week or two and I love them. I'm letting my husband finish the last of our toothpaste in a tube and then he will switch over as well. No more tubes going in the landfill, no more chemical fillers; just a cute little brown bottle and recyclable refill packages when we need more.

    Was this helpful?
  • PG
    Paul G.
    Verified Buyer
    Reviewing
    Immunity Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    6 days ago
    Teeth feel so much stronger

    My teeth are making a noticeable comeback in their strength and appearance.

    Was this helpful?
  • LM
    Lauren M.
    Verified Buyer
    Reviewing
    Immunity Compostable Refill
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    whole family loves it!

    kids and adults love the taste!

    Was this helpful?
  • JK
    James K.
    Verified Buyer
    Reviewing
    Immunity
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Duo immunity

    Makes me feel like I just left the dentist office. My teeth feel super clean.

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