Best plastic-free dental floss

How the 86/100 was earned.

1. 01

   Best overall89

   Dental Lace Silk Floss

   Dental Lace is the pick that solves both halves of the plastic problem at once. The floss itself is biodegradable mulberry silk with a light candelilla wax coating, so the thread going between your teeth is a natural fiber rather than the nylon or PTFE plastic in conventional floss, and it ships in a small refillable glass vial with a built-in stainless cutter. After the first purchase you buy only paper-wrapped refill spools, which are compostable, so the ongoing waste is close to nothing rather than a stream of plastic dispensers. In use it behaves like a proper silk floss, fine enough to reach tight contacts and strong enough to resist shredding, and the wax gives it just enough glide. The honest trade-offs are that silk is animal-derived and so not vegan, and that a waxed silk thread is slightly less slippery than a PTFE floss on very tight teeth, but as a complete, low-waste, plastic-free and PFAS-free system it is the standout.

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2. 02

   Best refill system86

   Georganics Natural Silk Floss

   Georganics is a natural oral-care brand widely stocked across Europe, and its silk floss is built around the same refillable idea as our top pick with a slightly different execution. The floss is silk coated in candelilla wax and often infused with a natural mint or charcoal, and it comes in a refillable glass jar so you keep the container and replace only the spool. Because Georganics is carried in so many shops and pharmacies, it is an easy one to actually find and rebuy, which is half the battle with any swap. It flosses cleanly and the mint versions give a light fresh finish without synthetic flavor. The trade-offs mirror any silk floss: it is not vegan, and it costs more per meter than a bulk plastic floss. For a readily available refillable silk system, especially outside the US, it is an excellent choice.

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3. 03

   Best vegan and widely available84

   The Humble Co. Dental Floss

   The Humble Co. is the pick for anyone who wants a vegan, plant-based floss that is genuinely easy to find, since the Swedish B-Corp is stocked in pharmacies and supermarkets across much of Europe. Its floss is made from corn-based PLA rather than nylon or silk, usually with charcoal and a natural mint, and comes in a refillable cardboard-and-glass or recyclable dispenser depending on the line. As a plant-derived bioplastic, PLA sidesteps both the petroleum nylon and the PTFE that carries PFAS concerns, and the brand's social mission is documented rather than implied. The honest caveat is that PLA is a bioplastic, so it is best understood as plant-based and industrially compostable rather than a raw natural fiber like silk, and home composting of PLA is unreliable. For a vegan, widely stocked, plastic-and-PFAS-free option, it is the clear choice.

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4. 04

   Best certified-organic silk83

   RADIUS Organic Silk Floss

   RADIUS is a long-established natural oral-care brand, and its silk floss stands out for using certified-organic ingredients in the coating, coated in organic candelilla wax and often flavored with organic mint or spearmint oil rather than synthetic flavor. The thread is biodegradable silk, so like the other silk picks it keeps petroleum plastic out of the thread itself, and the organic certification on the coating is a step most floss brands do not bother with. It flosses smoothly and the natural flavor is clean. The trade-offs are that some of its packaging is still a plastic case rather than a glass refill vial, so it is less of a zero-waste system than Dental Lace or Georganics, and as a silk floss it is not vegan. For someone who prioritizes certified-organic coating ingredients, it is the specialist pick.

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5. 05

   Best value vegan81

   Public Goods Dental Floss

   Public Goods is the value route into plant-based floss, sold at a low price that makes switching a whole household off plastic nylon floss painless. The floss is a plant-based fiber coated in candelilla wax rather than nylon or PTFE, so it avoids the petroleum thread and the PFAS-carrying PTFE coating, and it comes in a simple refillable dispenser. In use it is a straightforward, no-frills floss that does the job without synthetic flavor or brightly colored plastic packaging. Ranked honestly, it is a competent everyday floss rather than a premium one: the fiber is a plant-based bioplastic rather than natural silk, so the same compost caveat applies, and the range is deliberately minimal. For getting several people off conventional plastic floss affordably, it is the best-value pick, and worth checking the brand's membership model against how you shop.

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6. 06

   Best charcoal option79

   Lucky Teeth Organic Bamboo Charcoal Floss

   Lucky Teeth is the pick for anyone who specifically wants a charcoal floss, made from a plant-based fiber infused with activated bamboo charcoal and coated in candelilla wax, sold in a refillable glass vial with paper refills. The charcoal is a texture-and-flavor preference more than a proven cleaning upgrade, but the underlying product does the important things right: a plant-based, vegan thread rather than nylon, no PTFE and so no PFAS concern, and a genuinely refillable glass container that keeps plastic out of the routine. It flosses fine and the charcoal gives a slightly grippier feel some people prefer on smooth teeth. The honest points are that the charcoal offers no verified extra benefit beyond feel, and, as with any plant-based bioplastic thread, it is industrially rather than reliably home compostable. As a vegan charcoal floss in a real refill system, it is a good niche choice.

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What people ask us most.

Why avoid PTFE or 'glide' dental floss?

Because PTFE is a fluoropolymer, the same broad chemical family as the nonstick and stain-resistant coatings associated with PFAS, the so-called forever chemicals that persist in the body and the environment. The concern is not hypothetical: a peer-reviewed exposure study found that people who used a well-known PTFE glide-type floss tended to have higher blood levels of certain PFAS than those who did not, which is a documented, if modest, exposure pathway from an everyday product. Floss is a good place to remove that exposure precisely because the swap is so easy and low-cost: a silk or plant-based floss does the same mechanical job of cleaning between teeth without a fluoropolymer thread. If you want the fuller picture on this class of chemicals and where else they turn up, we cover it in our guide to PFAS and forever chemicals.

Is silk or plant-based floss better?

It depends on what you are optimizing for, and both are good plastic-free choices. Silk floss, made from mulberry silk with a natural wax coating, is a genuine natural fiber that is biodegradable and, in the refill formats, home-compostable, so it is the cleanest end-of-life story, but it is animal-derived and therefore not vegan. Plant-based floss, usually corn-based PLA, is vegan and avoids both the petroleum nylon and the PTFE coating, but PLA is a bioplastic, so it is best understood as plant-derived and industrially compostable rather than a raw natural fiber, and it will not reliably break down in a home compost. If a fully natural, compostable thread matters most and you are fine with an animal fiber, choose silk; if being vegan is the priority, choose a plant-based PLA floss. Both are large improvements on nylon or PTFE.

What should plastic-free floss come in?

The container matters almost as much as the thread, because most conventional floss ships in a single-use plastic dispenser that is thrown away when empty. The best plastic-free flosses use a refillable glass vial or jar with a metal cutter, so you buy the container once and then buy only paper-wrapped refill spools, which are compostable. That refill format is what actually keeps plastic out of your bathroom over the years, rather than just swapping one disposable plastic item for another. Some otherwise good flosses still come in a plastic case, so it is worth checking: a silk or plant-based thread in a glass refill vial is the most complete plastic-free system, and it usually works out cheaper per meter over time because the refills cost less than a whole new dispenser.

Does plant-based floss clean as well as regular floss?

For the job that matters, removing plaque and debris between teeth, yes. The cleaning action of floss is mechanical: a thread physically scrapes the sides of adjacent teeth and dislodges what a brush cannot reach, and a silk or plant-based thread does that just as effectively as nylon. The slickness of a PTFE glide floss is a comfort and speed advantage on very tight contacts, not a cleaning advantage, so if your teeth are tightly spaced you may find a waxed silk or plant-based floss takes a moment more to seat, but it cleans just as thoroughly once it is in. Dental authorities are consistent that the important thing is that you floss daily with something you find comfortable enough to keep using, not which fiber it is made from, so the best plastic-free floss is the one you will actually use every day.

How do I dispose of plastic-free floss?

It depends on the thread. Silk floss with a natural wax coating is biodegradable, and the paper refill spools are compostable, so a used length of silk floss can go into a compost bin, which is one of the quiet advantages of the refillable silk systems. Plant-based PLA floss is trickier: it is industrially compostable, meaning it breaks down in the high-heat conditions of a commercial composting facility, but it will not reliably degrade in a home compost or in landfill, so unless you have access to industrial composting it is realistically a lower-impact but not fully compostable option. In either case you are still far ahead of PTFE or nylon floss, which is a persistent plastic thread that simply goes to landfill. This kind of end-of-life thinking is part of the wider approach we take in our non-toxic personal care guide.

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