Plastic-free toothbrush in pregnancy: what actually matters
Microplastics research has moved fast: particles have been found in human blood and tissue, and the science on plastics we take in every day is being taken seriously for a reason. A toothbrush is one of the first things worth swapping, because nylon bristles shed into your mouth twice a day. Most bamboo brushes still use nylon. A nylon-free brush (horse hair or boar) puts natural fibre in the head instead.
Written by Reuben S., who runs BARE and packs every order. Published 14 September 2026
Why the toothbrush comes first
Pregnancy is often when people quietly cut plastics they had stopped noticing: bottles, wraps, bathroom clutter. The brush is easy to miss because it feels like a medical tool, not a plastic product. It is both. You abrade the head against your teeth every morning and night. When the bristles are nylon, some of that worn material leaves as microplastic fragments.
That makes the toothbrush a clean first swap. One item. Full control. No new habit stack. Food packaging and other sources still matter; they are just harder to fix in one step. Start where the plastic touches your mouth on purpose.
What to check on the label
Plastic-free in the mouth means the bristles, not only the handle. An ordinary toothbrush is polypropylene, often a soft grip, and nylon bristles. A bamboo handle only changes the part you hold. On nearly every bamboo brush sold in Australia, the bristles are still nylon. That is why “are the bristles plastic?” is the useful question.
Look for a named fibre: horse hair or boar. Skip labels that only say bio-based, biodegradable nylon, charcoal, or BPA-free. Those are still nylon families. We map the full list in nylon-free toothbrushes.
What the shedding research measured
Brushing wears bristles. When those bristles are nylon or PBT, some of the worn material leaves as tiny fragments. A 2025 study in Microchemical Journal, titled as preliminary results by its own authors, simulated brushing on a dental arch and measured an average release of up to roughly 39 microplastic particles a day from commercial brushes. Full caveats and methods live on Do toothbrushes shed microplastics?.
Separately, wider research keeps finding microplastics in the body. The field is young and moving quickly. You do not need a finished risk number to decide that a daily nylon head is worth swapping out.
A simple swap
- Read the bristle line on the pack before you buy.
- Prefer a named natural bristle (horse hair or boar) if you want nylon out of the head.
- Replace every 8 to 12 weeks, or sooner if the bristles splay.
- Brush with light pressure. Soft bristles still need a soft hand.
- Rinse well and dry upright in open air between uses.
Ours is sterilised horse hair woven into bamboo with no nylon and no glue. Horse hair is an animal product, so it is not vegan. First orders are covered by the 30-Day Soft Switch if the feel is wrong. More on feel and care: horse hair bristles, explained.
If gums feel tender, bleed, or anything about your pregnancy needs clinical advice, talk to your midwife, GP or dentist.
The short version
- Microplastics research is active for a reason. Particles have been found in blood and tissue.
- A nylon toothbrush sheds into your mouth twice a day. That makes it one of the first bathroom swaps worth making.
- Check the bristle material. Bamboo usually only describes the handle.
- Horse hair or boar puts natural fibre in the head. Soft Switch covers a first order if the feel is not for you.
Common questions
01Should I switch to a plastic-free toothbrush while pregnant?
If you are already cutting plastics where you can, the toothbrush is one of the simplest places to start. You use it twice a day, and most brushes (including bamboo ones) still put nylon bristles in your mouth. A nylon-free brush swaps that for a named natural fibre. For gum changes, bleeding, or anything clinical about your pregnancy, ask your midwife, GP or dentist.
02Do toothbrushes shed microplastics into your mouth?
Yes, when the bristles are plastic. A 2025 Microchemical Journal study, labelled preliminary by its own authors, simulated brushing and measured on the order of dozens of nylon and PBT particles a day from commercial brushes. We unpack the evidence on our dedicated microplastics guide.
03Why start with the toothbrush?
Because it is daily, it is abrasion, and the plastic is on the part that goes in your mouth. Food packaging and other household plastics matter too, but a brush is a one-item swap you control completely. Check the bristle material on the label: horse hair or boar for nylon-free, bamboo alone for the handle only.
04Is a bamboo toothbrush plastic-free?
Usually not. The handle can be bamboo while the bristles are still nylon, and nylon is the part that wears and sheds. Check the bristle material on the label. Nylon is the most widely used toothbrush bristle material.
05What should I look for on the label?
The bristle material, written plainly: horse hair, boar, or nylon. Words like bio-based, biodegradable nylon, charcoal, or BPA-free still mean nylon. Bamboo on its own only describes the handle.
06Is a horse hair toothbrush okay if my gums feel different in pregnancy?
Horse hair is a soft natural bristle, which many people find gentle when gums feel tender. Ours is sterilised horse hair woven into bamboo with no nylon and no glue. It is an animal product, so it is not vegan. Care is the same as any brush: rinse, dry upright in open air, replace every 8 to 12 weeks. Persistent bleeding or pain is a dentist or midwife conversation.
07What is different about The Bare Brush?
The bristles. BARE uses sterilised horse hair woven into a bamboo handle, with no nylon and no glue. Horse hair is an animal product, so it is not vegan. First orders are covered by the 30-Day Soft Switch if the feel is not for you.
Nothing here is medical or dental advice. The research cited is current as at September 2026. For anything about your own pregnancy or oral health, talk to your midwife, GP or dentist.