I get it, you want to know if you're meeting your daily essential microplastics and minerals quota, we all do.

A lot of toothbrushes advertise themselves as "improved whitening" or similar things because the design of the bristles and the action (on electric brushes) actually does help them break up stains, and thus help whiten teeth, when used properly.

As for the antimicrobial claims, there are many materials that are human safe that are also naturally antimicrobial. For instance, brass self sanitizes in as little as 15 minutes, which is why it's the most common material for doorknobs.

They're made from fused microplastics.

Cancer. At this point as an American consumer, if it's something you put in an orifice that comes from a large corporation, and is synthetic, assume it's carcinogenic

Ingredients: 1 toothbrush

'Begging the question' means using circular logic, not that something makes one curious. An example of begging the question would be asking a heterosexual if their mother knows they're gay. Hope this helps.

Well, there are multiple parts to a toothbrush, the bristles, the handle, and anything else that may be attached to it.

The bristles, the bit that wears down, generally are nylon unless noted.

https://jingsourcing.com/p/b46-toothbrush-bristles-material/

The handle, again generally, is recycled plastic.

Added bits may be rubber.

I'm very much not worried about my toothbrushes, but if you want, looks like you can get premium toothbrushes where the stuff it's made out of is a selling point.

One example, first hit that comes up:

https://www.brushwithbamboo.com/shop/bamboo-toothbrush-adult/

• Standard soft bristles made from 100% Castor Bean Oil. USDA Certified 100% Biobased. Bristles made in the European Union.
• FSC® certified bamboo handle.
• The box encasing the toothbrush is made from paper – no tape or glue is used.
• Your bamboo toothbrushes can be used for just as long as plastic toothbrushes.
• USDA Certified Biobased. Green American Certified. Vegan. BPA-Free. Natural and Non-toxic.

That being said, I recall that re: "100% Castor Bean Oil", ricin is made from castor beans, and that's probably one of the most-lethal substances you could reasonably get ahold of and put inside yourself. :-)

kagis

https://en.wikipedia.org/wiki/Ricin

Ricin (/ˈraɪsɪn/ RY-sin) is a lectin (a carbohydrate-binding protein) and a highly potent toxin produced in the seeds of the castor oil plant, Ricinus communis.

While manual brushing can effectively remove surface stains, electric toothbrushes are equipped with features that deliver a deeper clean, leading to a brighter smile.

They clean stains off your teeth better so they prolly dont need to add shit to the brush if their ad claims are covered by just being mechanically better. Why add any operating cost adding actual agents that prolly won't produce any noticeable difference from other mechanical brushes?

A toothbrush is actually a small sea creature who is murdered and harvested for its dental powers. /s

https://carifree.com/blog/what-are-toothbrushes-made-of/

Are you eating your toothbrushes?

I agree with you but: What incentive do they have to reveal the thing that makes their product competitive to other brands for those others to steal their idea just because you want to know about it?