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Your Electric Toothbrush Is Feeding You 2.3 Million Microplastics A Year, And Pulsing EMF Beside Your Brain
If you own an electric toothbrush and have never questioned what it is actually doing to your body, there are two things you should know before you brush again.
By Megan Reilly✓Wellness Editor
13 August 2026
You bought an electric toothbrush because it cleans better than your hand. Nobody checks what the head is made of.
It is nylon, in a plastic housing. And plastic bent back and forth thirty thousand times a minute does what plastic does.
The bristles are plastic, and they are shedding
A 2025 study in Ecotoxicology and Environmental Safety measured roughly 3,000 microplastic particles per session. Twice a day, that is 2.3 million a year.
And that was a manual brush. A sonic motor does not slow it down.
The location matters more than the number. Gum tissue is among the most absorbent surfaces on the body.
The "eco" alternative is nylon too
Most people then find a brush advertised with castor oil bristles. That castor oil is converted into nylon-11.
The feedstock changed. The material did not. It still frays and sheds like nylon under a sonic motor.
Those particles do not pass through
They do not simply pass through. Microplastics have been found in human arteries, brain tissue and breast milk.
A 2024 study followed people with microplastics in arterial plaque. Over three years they had a 4.5 times higher risk of heart attack, stroke and death.
Most sources of microplastic exposure are effectively impossible to avoid. The one in your bathroom is not one of them.
Then there is the motor
Every running motor generates an electromagnetic field. You hold this one against your jaw, inches from your brain, four minutes a day.
So we put every brush on the same meter, at the same distance, and measured.
Roughly 19x less electric field, and 5x less magnetic field: 88.29 µT against 17.62 µT. Same ERICKHILL RT-100 meter, 100+ readings averaged at the highest intensity, same distance and mode. Individual readings may vary.
People who keep the router out of the bedroom press a running motor to their skull twice a day without thinking about it.
That 14 V/m reading is the PRIMALS handle.
➞ Switch To The Low-EMF Brush 2-year warranty • Free gifts with every bundleAnd the head itself is a wet plastic cavity
Click-on heads are hollow, and that hollow sits wet for weeks. You cannot see inside it or clean it.
The plastic is petroleum-derived, which is where BPA, phthalates and PFAS come in. All three are endocrine disruptors.
None of this is an argument against electric toothbrushes. The motor is genuinely better than your hand. The problem is everything built around it.
Not nylon-6, not nylon-11. PRIMALS bristle is keratin.
➞ Get The Natural-Bristle Brush 60-day satisfaction guarantee • Free shipping on $100+What people are switching to instead
The fix is a head that was never plastic. That did not exist until recently, because nylon is cheap to machine and natural bristle is not.
PRIMALS built one anyway: real horse bristle hand-woven into bamboo, on a low-EMF sonic motor. Horse bristle is keratin, the same protein as hair, and it is the softest natural bristle there is.
On that same meter, the PRIMALS handle read 14 V/m, roughly 19x less electric field than the leading sonic brush. The bamboo head is heat-carbonized, so it dries instead of holding water.
And it still runs at 62,000 vibrations per minute, removing 10x more plaque than manual brushing.
You do not have to give up the deep clean to get away from the plastic. That was the whole point.
PRIMALS Horse Bristle Electric Toothbrush
- 🐎Real horse bristles. The softest natural bristle, hand-woven into bamboo.
- ⚡62,000 VPM sonic. 10x more plaque removed than manual brushing.
- 🧠Low-EMF engineered. 14 V/m on the meter against 265 V/m.
- 🌿Zero microplastics. No nylon, so nothing sheds.
- 🧬No BPA, phthalates or PFAS. No toxic glue in the head.
- 🔋365-day battery. Charge once, brush for a year.
Free shipping on $100+ • 2-Year Warranty • Free gifts with every bundle
How it compares
What people said after switching
It now holds a 5.0 rating from verified buyers. A few of their comments are below.
I've tried every electric on the market. Oral-B, Sonicare, Quip, Burst. This beats all of them. The natural bristles are so gentle on my gums.
No gimmicks, no nonsense. The brush works great and there's no plastic in my mouth.
Two months in and still impressed. Thought the novelty would wear off. It didn't. Best brush I've used.
100,000+ people have already switched.
➞ Switch To PRIMALS Now 60-day satisfaction guarantee • Free shipping on $100+Questions readers have asked
Two things. The nylon heads shed microplastics, and the sonic motor speeds that up. And the motor emits an electromagnetic field right next to your head twice a day. You wanted a better clean, not plastic and radiation.
Not really. Castor oil bristles are nylon-11, a plastic filament made from a plant feedstock instead of petroleum. The source changed, the material didn't. It still frays and sheds into your mouth, and a sonic motor speeds that up the same way.
No. Horse bristle is the softest natural bristle, and the 62,000 VPM sonic motor does the work. You get the deep clean from the vibration with the gentlest possible touch on your gums, which is exactly what you want for sensitive or receding gumlines.
Yes. The replacement heads fit all Philips Sonicare click-on handles, including Protective Clean, Expert Clean, Diamond Clean, 9900 Prestige, Healthy White and Flex Care. If your current head clicks on without twisting, it fits. PRIMALS is not affiliated with or endorsed by Philips. Compatibility is based on handle design only.
Up to 365 days on a single charge, depending on use, with wireless charging on the included dock. The brush is also IPX7 waterproof, so you can use it in the shower and rinse it under running water with no worry.
Every 1 to 3 months, or sooner if the bristles fray. It comes with 2 horse heads to start, and replacements come in 4-packs. Subscribe so you never run out.
Look at the bristles. The vast majority still use nylon. Since the bristle is the only part that contacts your mouth, a bamboo handle changes nothing. PRIMALS uses a bamboo base plus actual horse bristle, natural keratin from top to bottom.
Orders ship quickly with tracking, and every unit comes with a 2-year warranty and same-day human email support. If anything is ever off, we make it right.
Keep the deep clean. Lose the plastic and the field.
➞ Switch To PRIMALS NowFree shipping on $100+ • 2-Year Warranty