Swap the bristles, not just the handle.
100% Plastic-Free Natural Bristle & Bamboo Toothbrush
100% Plastic-Free Natural Bristle & Bamboo Toothbrush
Australian owned. Horsehair bristles, zero nylon.
Why it’s different
- Horsehair bristles. No nylon touches your teeth.
- Bamboo handle, no glue. The bristles are anchored, not glued.
- The whole brush composts. Handle and bristles.
- Up to a year in one box. 4 brushes, one every 2 to 3 months.
Couldn't load pickup availability
Try it for 90 days or your money back. Returns and refunds
- American express payment method
- Apple pay payment method
- Google pay payment method
- Master payment method
- Paypal payment method
- Shopify pay payment method
- Unionpay payment method
- Visa payment method
Aussie Owned
- 90 Day Guarantee
- Insured Shipping
Less than 1%Â of customers claim our Money Back Guarantee
- Zero nylon
- No glue
- No bisphenols
- Horsehair, never boar
- Sterilised, not bleached
- Whole brush composts
- 90-day money-back guarantee
- Aussie owned
Join 400+ Health Conscious Lightsiders
What People Ditching Plastic Have to Say
We Didn't Rebrand Plastic.
We Removed It.
For your mouth. For the planet. Every single bristle.
Zero Plastic.
No Forever
Chemicals.
No Epoxy.
No Bisphenols.
Not Boar.
Not Synthetic.
Biodegradable.
Not Bleached.
100% Plastic Free & Aussie Owned
We Didn’t Rebrand Plastic.
We Removed It.
For your mouth. For the planet. Every single bristle.
Zero Plastic.
No Forever Chemicals.
No Epoxy.
No Bisphenols.
Not Boar.
Not Synthetic.
Biodegradable.
Not Bleached.
How it’s made
From a horse’s tail to the soil.
One bristle, followed the whole way: what it is, how it’s put together, and where it ends up.
-
No. 01 · Horsehair
It starts as horsetail hair.
Mongolian horsetail hair. Keratin, the same stuff as your own hair, and softer than boar. Sterilised, not bleached, so nothing synthetic touches your teeth.
-
No. 02 · Bamboo
Then bamboo.
One piece of bamboo, light in the hand, where the plastic used to be.
-
No. 03 · The brush
Set, not glued.
The hair is anchored into the bamboo mechanically. No glue to soften, no nylon to shed, no plastic anywhere on it. Swap it every 2 to 3 months.
-
No. 04 · The soil
Back to the earth.
Done with it? The whole brush goes in the compost. Handle, bristles, all of it.
The cost of waiting
A plastic brush sheds 2.33 million pieces of plastic a year.
That is the lab estimate for one toothbrush. Scroll through twelve months of it.
2,330,000
Plastic particles shed
One plastic toothbrush, in a laboratory brushing simulation
Month one
You won’t see it.
Most of the pieces are narrower than a human hair. They come off the bristles as they wear, and bristles wear from the first brush.
Month six
You won’t feel it.
Nothing changes in the mirror. The brush looks fine, the count keeps climbing, twice a day, every day.
Month twelve
You can stop it on day one.
Horsehair bristles shed hair, not plastic. Swap the brush and this counter stays at zero. Try it for 90 days or your money back.
Wang et al. 2025, Ecotoxicology and Environmental Safety 302:118694: at least 2.33 million microplastic particles a year from one toothbrush, in a laboratory brushing simulation. Horsehair bristles shed no plastic; the electric handle is plastic and stays out of your mouth.
Why Lightside
What you get with Lightside.
Zero Nylon. Zero Plastic.
Most bamboo toothbrushes still use nylon bristles. Lightside uses natural horsehair. Plastic-free at both ends.
No PFAS. No Forever Chemicals.
PFAS are built not to break down, so they build up in the environment and in people. Lightside has none.
No Glue. No Epoxy. No Bisphenols.
Bristles are mechanically anchored into the bamboo. No adhesive, no BPA, BPF or BPS.
Natural Horsehair. Not Boar. Not Synthetic.
Softer than boar, and genuinely plastic-free. Keratin fibre from root to tip.
100% Biodegradable
Handle, bristles, packaging. Compost the whole thing when you’re done.
Sterilised, Not Bleached
No bleach involved.
Shipping & Sourcing
Bear with us. We’re bringing stock to Australia.
We’re an Australian owned brand still in our early days. Right now every brush is sent directly from our manufacturing partner to your door, and we’re working toward holding stock here at home to bring delivery times down considerably.
Free Shipping
Shipping direct from our maker means we absorb the freight instead of adding it to your cart.
7 to 15 Days
Standard delivery from dispatch. Tracking can sit quiet for a stretch while your parcel is in transit. That’s normal.
Fully Insured
Every order is covered end to end. If something goes wrong in transit, we make it right.
Why it takes a little longer
A local warehouse would mean holding stock, and passing that cost on to you. Domestic freight alone would add around $11 to every order. We’d rather keep shipping free and be upfront about the trade off: your brush takes a little longer to arrive. That’s the deal, and we think it’s a fair one while we grow.
Thanks for backing a small brand early.
The Lightside Team
The evidence file
What’s so bad about plastic toothbrushes?
Seven peer-reviewed papers. What each one found, what we take from it, and where it stops. If a study cuts against us, it stays in.
Do plastic toothbrushes shed plastic?
Yes. Three labs, three methods, same answer.
A plastic brush sheds plastic as it wears. 2.33 million+particles a year, on average, from one toothbrush in a lab brushing simulation
Researchers ran ordinary toothbrushes through a mechanical brushing rig, then scaled the release to how often people brush. 63% of the debris was smaller than 100 micrometres, narrower than a human hair. New hard-bristled brushes shed fastest at first.
Ecotoxicology and Environmental Safety, 2025 → (opens the paper in a new tab)Every brush stroke grinds a little plastic off. A horsehair bristle has none to give.
A machine did the brushing, so it can’t say what reaches your body. The authors concluded these brushes don’t directly add to health risk; their concern was the environment.
Of everything in the bathroom cabinet, toothbrushes carried the most. 30 to 120microplastic particles per toothbrush, the most of any product tested
Researchers tested six kinds of oral care product sold across India, from toothpaste and mouthwash to floss and breath spray. Every product contained microplastics. Toothbrushes held the most, and topped the authors’ projection of yearly exposure per person: about 48,910 particles.
Environmental Pollution, 2024 → (opens the paper in a new tab)Among oral care products, the brush is the first thing worth changing.
Products came from one country, and the yearly figure is a projection, not a measurement in people.
Under a Raman microscope, the debris is plastic.
The team built an imaging method to tell plastic debris apart from the other particles mixed into toothbrush material, and confirmed that toothbrushes release microplastics during use. They put the amount in the order of thousands a day, and note it varies.
Environmental Pollution, 2023 → (opens the paper in a new tab)A different lab with a different method reaching the same conclusion: brushes shed plastic.
The subject was the imaging technique, not a count, and nothing was measured in a mouth.
Does plastic end up in people?
It’s been found in tissue all over the body.
Plastic turned up in every brain, liver and kidney sample tested. 7 to 30×more plastic in brain samples than in liver or kidney, as the researchers measured it
Working with postmortem tissue, researchers found micro and nanoplastics in every sample. About 75% of the plastic in brain tissue was polyethylene, mostly shards 100 to 200 nanometres long. Brain samples from 2024 held about 50% more than samples from 2016, comparing two different groups of people eight years apart.
Nature Medicine, 2025 → (opens the paper in a new tab)Plastic isn’t just an ocean problem anymore. It’s measurable in people.
The data are associative, not causal, and the authors say so. Measuring plastic in fatty brain tissue is hard, and other scientists have questioned how high these numbers really are.
Jagged plastic fragments, sitting inside artery plaque. 58.4%of the 257 patients studied had polyethylene in plaque removed from a neck artery
Surgeons removed plaque from the neck arteries of patients being treated for artery disease. Under an electron microscope, the team saw jagged-edged plastic particles sitting among the body’s own immune cells.
New England Journal of Medicine, 2024 → (opens the paper in a new tab)This is plastic found inside human tissue, among the body’s own immune cells. That’s what moved the question from the environment to us.
Everyone studied already needed artery surgery, so it says nothing about healthy people. The paper also tracked patients afterwards; that’s an association, which the authors say doesn’t prove cause. We stop at what was found.
Is it harmful? And what’s sensible?
Not proven. Cutting easy exposures is still sensible.
Found almost everywhere. Proven harmful? Not yet. 16,000+chemicals associated with plastics. About a quarter have had extensive toxicity testing.
The review lists microplastics found in human blood, lung, liver, kidney, placenta, testis and brain. Of the plastic-associated chemicals that have been tested, 4,200 showed hazards. Only about 1% of what’s swallowed is thought to be absorbed.
Current Environmental Health Reports, 2026 → (opens the paper in a new tab)The honest answer is “we don’t know yet”. Waiting for proof is a choice too, and cutting easy exposures costs little.
The authors say evidence directly linking microplastics to disease in people is still limited, and many lab studies used doses far above anything found in the real world.
Plastic sheds most where there’s heat or friction. Heat + wearthe two biggest triggers for plastic shedding from everyday products
Reviewing kitchen and food products, the authors found measurable plastic release from tea bags, cutting boards, blenders, containers and bottles in normal use, and named eating and drinking as the main way particles reach people. Their advice: choose non-plastic options like glass or stainless steel where heat and wear are involved.
Toxics, 2026 → (opens the paper in a new tab)Brushing is friction, twice a day, in your mouth. We apply the same logic there.
It covers kitchen and food products, not toothbrushes, so the toothbrush link is our reasoning, not theirs. Its biggest numbers come from stress tests, not everyday use.
FAQ
Answering all your questions.
Lightside uses horsehair bristles, a natural keratin fibre that is fully biodegradable, with no synthetic polymers. No glue either: the bristles are anchored into the bamboo. Plastic-free from handle to bristle.
Care Guide
How to look after your brush.
Natural bristles last well with a little routine care. It takes under a minute a day. Here’s everything you need to know.
-
Rinse thoroughly after brushing
Rinse the head under warm running water and rub the bristles gently with your thumb to clear out any remaining toothpaste and debris.
-
Dry the bristles
Shake off excess water, then give the head about 20 seconds with a hairdryer on a cool setting. Natural bristles hold moisture longer than plastic ones, and keeping them dry is the best way to keep the brush fresh and extend its life.
-
Store it upright in open air
Keep the brush head-up in a cup or holder where air can circulate. Avoid sealing it in a cap or travel case while it’s still damp.
-
Keep brush heads apart
If it shares a holder with other brushes, make sure the heads aren’t touching.
-
Store it away from the toilet
Keep it out of splash range, and close the lid before flushing.
-
Replace it every 2 to 3 months
Swap it out when the bristles begin to splay, as you would with any toothbrush. The whole brush, handle and bristles, can go in your home compost.
Why drying matters
Our bristles are 100% natural, with no plastics or chemical treatments. That’s what makes the brush compostable, but it also means there’s nothing artificial keeping moisture at bay, so a quick dry after brushing does that job instead.
Packaging notice. Updated
Our manufacturer has answered
Lightside stocks horsehair only and is sourced from a separate production line to boar hair. We do not intend to sell any boar bristle.
Separate sources
Good news for our Muslim customers! Horse and boar bristle come from two different suppliers and are not produced on the same line. They are also visibly different in colour, so a mix-up would be obvious on sight.
Thanks for holding us to a high standard. The Lightside Team
Last updated 12 August 2026