How Australian retailers describe “eco” toothbrush bristles

On 19 October 2026 we read 92 online listings for bamboo and other “eco” manual toothbrushes on nine Australian retailer sites, covering 35 different products. For each listing we recorded what it says the bristles are made of, and whether it calls the whole toothbrush biodegradable, compostable or plastic-free.

What the listings say

Bristle material not named

39 of 92 listings (42%) do not say what the bristles are made of. Descriptions such as “charcoal-infused” or “bio bristle” were not counted as naming a material.

Plastic, where the material is named

52 of 53 listings that name the material name a plastic. 43 name nylon, PBT or “polymer”. 9 name bristles made from castor or soy oil, often sold as “plant-based”, which we count as plastic (see the coding rules below). The other listing names boar or horse hair.

Whole brush called biodegradable, compostable or plastic-free

38 of 92 listings (41%) say the whole toothbrush is biodegradable, compostable or plastic-free while the bristles are plastic (28) or not named (10). The wording used: biodegradable on 21, compostable on 11, plastic-free on 9. Some listings use more than one.

Never qualified

17 of those 38 never mention, anywhere on the listing, that the bristles should be removed or are not biodegradable. The other 21 (more than half) contradict themselves: they say so elsewhere on the same page.

Disposal instructions

36 of 92 listings (39%) tell the shopper what to do with the brush at the end of its life. That rises to 29 of 52 where the named material counts as plastic, and falls to 7 of 39 where they are not named.

Pharmacy sites

1 of 15 pharmacy listings names the bristle material.

Read the numbers with these limits

• Mostly marketplace sellers. 53 of 55 supermarket and department-store listings are third-party sellers on those sites, not the retailer itself. The results describe what shoppers see on those sites, not each retailer’s own range.
• Big W is a subset. We opened 23 of the 64 in-scope Big W results, chosen to cover different products rather than at random. Treat its share as indicative.
• Online listing text, not pack labels. We coded the title, description, ingredient and specification panels and breadcrumbs. A pack may name a material its listing does not.
• One day, uneven coverage. Listings change. Chemist Warehouse (5 listings) and Kmart (3) are small samples. Coles, Target and TerryWhite Chemmart returned no in-scope listing in our searches (Coles stopped us with a bot check after five searches), and 8 specialist eco listings were out of stock when read.
• Automated second pass, no independent human coder. BARE coded every listing against rules written before coding began. A second automated (AI-assisted) coding pass then re-coded all 37 rows first coded as conflicts and 28 others. It agreed on 90 of the 92 rows. The one clear miss, a bare “biodegradable” feature bullet on a listing that names nylon bristles, was corrected. One borderline row was left out, because its FAQ answer limits composting to the handle. Ten rows drawn at random were also re-checked against the live pages on 19 October 2026 and none had changed.

By type of retailer

Listings read on 19 October 2026, shown as counts. A whole-brush claim means the listing calls the toothbrush biodegradable, compostable or plastic-free while the bristles are plastic or not named.

Specialist eco retailers name the material on almost every listing and usually explain removing the bristles. 8 of their whole-brush claims appear only in a brand-story or “About the brand” panel lower on the page, such as one that says to “bury or compost” the toothbrush. Leaving those 8 out, the overall count is 30 of 92, and the unqualified count is 14 of 92. One more listing has such a panel but also makes a whole-brush claim in its opening sentence, so it stays in.

Method

What counts as a listing

One product page on a retailer’s Australian site, including marketplace sellers on that site. Colour, pack-size and seller variants are separate rows, and a product code groups listings of the same product.

Included

Manual toothbrushes for adults and children with a bamboo handle, or marketed as eco, biodegradable, plant-based, sustainable, corn starch, sugarcane or wheat straw.

Excluded

Holders, travel kits, pet and interdental brushes, floss, electric brushes, silicone baby brushes and brushes with a recycled-plastic handle.

Coding rules

Bristles made from castor or soy oil count as plastic. They are a nylon, and listings on two retailer sites in the sample call them nylon or “a form of plastic” (see are castor-oil bristles plastic?). A claim counts only when it is made about the whole toothbrush. “Made from biodegradable bamboo” and “Bio” in a title were recorded but not counted. Retailer navigation labels were recorded but not counted.

Qualified or not

A whole-brush claim is qualified when the same listing also says the bristles must be removed before composting, or are not biodegradable or compostable.

Retailer sites searched

Woolworths (including Everyday Market sellers), Big W (including marketplace sellers), Kmart (including Marketplace sellers), Coles, Target, Chemist Warehouse, Amcal, Priceline, TerryWhite Chemmart, Biome, Flora & Fauna, Nourished Life.

Access

Pages were read through each site’s public pages or public product data, or by hand in a browser where search runs in the page. No bot protection was bypassed. Sites that refused access were read by hand or not at all.

Checking

Every quoted phrase in the dataset is checked by a script against the saved text we hold for that listing, and the build fails if any phrase is missing. For 51 listings that text is the page’s own source data. The other 41 (Big W, Amcal, Priceline, Chemist Warehouse and Kmart) were read by hand in a browser, so the saved text is a trimmed transcription of the visible page, not the raw page source. For those, the script confirms the quote matches our transcription, not the live HTML.

Use it

Published under CC BY 4.0. Please keep the limits above with any number you reuse.

Cite as: The BARE Brush, How Australian retailers describe eco toothbrush bristles: online listing audit, October 2026, v1.1, thebarebrush.com.au/research/eco-toothbrush-label-audit

Download the dataset (CSV) with one row per listing, the quoted listing wording and how each was coded. Brand and seller names are replaced with [brand]. Journalists who want the listing links can ask us.

Changelog

• 2026-10-19 · Version 1.1, correcting version 1.0 the same day after a second, automated (AI-assisted) coding pass. One listing with a bare "biodegradable" feature bullet and nylon bristles was missed in version 1.0 and is now counted, which moves the whole-brush claim figure from 37 to 38 listings and the unqualified figure from 16 to 17. One listing that was already counted also has a whole-brush claim in its opening sentence, outside its brand-story panel, which is now recorded. The figure that leaves out brand-story panels now covers every brand-story or "About the brand" panel, not one retailer's, and moves from 31 to 30. We also corrected how the checking is described: for the 41 listings read by hand in a browser the saved text is a trimmed transcription, not raw page source, and the coding was a first pass plus an automated second pass, not a single pass. One borderline listing was reviewed and left out, because its answer limits composting to the handle.
• 2026-10-19 · Version 1.0 published: 92 listings on nine retailer sites, read on 19 October 2026. Ten randomly drawn rows were re-checked against the live pages the same day and none had changed.