What Your Toothbrush Has to Do with Fertility

You've done the prenatal bloodwork. You've started the supplements. You've cut the alcohol, cleaned up your diet, tracked the cycles.

You're doing everything right.

But twice a day — every morning and every night — you and your partner are putting something in your mouths that contains the exact class of chemicals fertility specialists warn about.

Not food. Not water.

Your toothbrush.

This isn't a wellness theory. It's peer-reviewed research. And once you see the connection, you can't unsee it.

The chemicals you're already avoiding — and the one source you missed

If you're on a fertility journey, you've probably heard of endocrine disruptors.

BPA. Phthalates. PFAS.

These chemicals mimic or block hormones in the body — specifically the hormones that regulate ovulation, implantation, sperm production, and embryo development.

The World Health Organisation classifies them as endocrine-disrupting chemicals — substances that interfere with the endocrine system and can cause adverse health effects.

You already know this. That's why you switched to glass containers. BPA-free water bottles. Fragrance-free products. Clean skincare.

But here's the blind spot:

Many plastic products — including toothbrushes — can contain BPA, phthalates, and PFAS.

And a toothbrush doesn't sit on your shelf. It goes inside your mouth — pressed against your gums — 730 times a year.

What's actually happening when you brush

In 2025, researchers published a study in Ecotoxicology and Environmental Safety that measured exactly how many microplastic particles a toothbrush sheds during normal use.

The result:

Fragments. Fibres. Films. Pellets.

Particles smaller than 100 micrometres — invisible to the eye, impossible to rinse away.

The study also found that the shedding rate increases the longer you use the brush. An older toothbrush sheds more than a new one.

These aren't inert particles. They're made from nylon, polypropylene, and polyethylene — polymers that can carry the exact endocrine-disrupting chemicals you've been working so hard to eliminate from every other part of your life.

The bigger picture: where microplastics are showing up

Your mouth is one of the most absorbent tissues in the human body. It's why sublingual medications work — substances pass through the mucosal lining directly into the bloodstream.

And microplastics are showing up everywhere in the body.

Meanwhile, on the male side:

Nobody is claiming toothbrushes alone are causing infertility. That would be irresponsible.

But when you're on a fertility journey, you control what you can control. You eliminate the exposures you can eliminate.

And right now, twice a day, you're pressing petroleum-based plastic against one of the most absorbent tissues in your body — in a product that is confirmed to shed millions of microplastic particles per year.

The bamboo toothbrush doesn't fix this

Already switched to bamboo? Check the bristles.

If they're white, shiny, and uniform — they're nylon. Petroleum-based plastic. The exact same material shedding microplastics in the study above.

Nearly every bamboo toothbrush on the market uses nylon-6 bristles. Some brands claim "biodegradable Nylon-4," but when independent researchers lab-tested those claims, the bristles were actually standard Nylon-6 — not biodegradable at all.

What actually eliminates the exposure

Before nylon was invented in 1938, every toothbrush used natural bristles. Boar hair. Natural keratin. Woven into wooden handles.

Zero microplastics. No BPA. No phthalates. No PFAS. Used safely for centuries.

A boar bristle toothbrush cleans teeth the same way a nylon brush does — without shedding a single microplastic particle.

One is plastic. One isn't.

One adds to your endocrine disruptor exposure twice a day.

One adds zero.

About Toxin Rebellion

Toxin Rebellion makes the only toothbrush with 100% natural boar hair bristles woven directly into a steam-carbonised bamboo handle.

No nylon. No glue. No chemical adhesives. No microplastics.

Every component is fully compostable. The handle is steam-carbonised at 300°C to eliminate mould and bacteria.

It costs about $0.08 per day.

Less than a single prenatal vitamin capsule.

You're already managing supplements, tracking cycles, timing everything.

This swap takes 30 seconds.

Same routine. Same brushing time. Same cup on the counter.

The only difference is you're no longer pressing plastic against the most absorbent tissue in your body — twice a day — during the most important months of your life.