Bamboo toothbrushes: are the bristles plastic?

Usually, yes. A bamboo toothbrush swaps the plastic handle for a plant one, but the bristles are almost always nylon, which is a plastic. It's still a worthwhile change, as long as you know what you're buying.

The handle is the biggest part of a toothbrush, so a bamboo brush does cut plastic. What it doesn't do is make the brush plastic-free, and labels such as "plant-based bristles" or "biodegradable nylon" don't change that.

What are toothbrush bristles made of?

Standard toothbrushes have traditionally had a polypropylene handle and nylon bristles, as a 2026 systematic review of bamboo and other "biodegradable" brushes notes. Bamboo brushes keep the bristles and change the handle:

• In a 2024 clinical comparison, the bamboo brush tested was a bamboo stick with plastic bristles.
• A 2025 study of the social impacts of toothbrush production modelled the typical bamboo brush as a bamboo handle with fossil-based nylon bristles.

What about "plant-based" or "biodegradable" bristles?

You'll see a few claims on bamboo brush packaging. Here's how they fit our definition of plastic:

• "Plant-based", "castor bean" or "bio-based" nylon. This is nylon made partly or wholly from plant oil instead of fossil fuel. It's still a synthetic polymer, so it's still plastic. What a plastic is made from doesn't change what it is.
• "Nylon-4" or "biodegradable nylon". Some brands say their bristles break down. Under our definition it's still plastic, and we haven't found independent evidence that these bristles break down in a home compost heap or a UK council collection.
• "BPA-free". This tells you nothing about whether the bristles are plastic.

The genuine exception is natural bristles, usually pig hair. They are not plastic. They're an option if you're comfortable using an animal product; check with your dentist if you have sensitive gums.

Does a bamboo brush clean as well?

As far as the evidence goes, yes, and the brush matters less than how you use it.

• A 2026 systematic review pooled five randomised trials comparing bamboo and other natural brushes with conventional plastic ones. It found little to no difference in plaque, but rated the certainty of the evidence as very low, so this isn't settled.
• A small 2024 trial found bamboo, miswak and conventional brushes all reduced plaque over eight weeks.

The NHS advice applies whatever the handle: for most adults, a brush with a small head and medium or soft round-ended bristles is fine, and brushing twice a day for about two minutes with fluoride toothpaste matters more than the type of brush.

Do toothbrushes shed microplastics?

Some research suggests they do. A 2025 study in China simulated brushing and found plastic brushes released microplastics during use, with hard-bristled brushes shedding faster at first. The authors concluded the brushes they tested did not directly pose a health risk, but that daily use adds microplastics to the environment.

This is one study of one market's products, so treat it as an early signal. It's also a reminder that changing the handle doesn't change what the bristles are made of. For background, see what are microplastics?

Is a bamboo brush better for the environment?

On the evidence we've found, yes. A UK life cycle assessment compared four brush types over five years. The bamboo brush and a plastic brush with replaceable heads had the lowest environmental impact in every category measured. The electric toothbrush had the highest impact in 15 of 16 categories, and its climate impact was 11 times that of the bamboo brush.

The picture isn't purely positive. The 2025 social impact study found bamboo brushes had environmental benefits but higher social risks, such as labour conditions, because of where they are made. A plastic brush with replaceable heads is a reasonable alternative if you'd rather keep a handle for years.

How do you dispose of a bamboo toothbrush?

The handle and the bristles need to go different ways:

• Pull out the bristles with pliers. They're nylon, so put them in your general waste.
• The handle, if it's plain bamboo with no paint or varnish, is plant material. A snapped handle can go in a home compost heap, though it will break down slowly. If it's painted or coated, put it in general waste.
• Or reuse the handle as a plant label or for cleaning grout.

What should you look for?

• A plain, uncoated bamboo or wooden handle.
• Honest labelling that says the bristles are nylon, rather than vague "eco" wording.
• Medium or soft bristles, as the NHS advises for most people.
• Natural bristles if you want to avoid plastic entirely and accept animal hair.
• Plastic-free or card packaging.

For the scored swap, see plastic toothbrush → bamboo. Other bathroom changes, such as shampoo bars and safety razors, are on the bathroom hub and in our plastic-free bathroom guide.