I bet you thought that was a totally silly question, that only an idiot - or one of those morons filming themselves on camera doing stupid stuff just to get attention - would even give it a try. Come to think of it though, not much difference between the two categories. They probably are eating tires, too, but then, so are we.
We haven't studied it - yet - here in the US. But Switzerland has. And the answer they found is pretty much everybody has been eating, drinking, even breathing, tires. Yep, rubber automotive tires.
The thing is, what probably everybody knows without considering the implications, is that tires aren't just rubber. They get vulcanized for strength and longevity of use. You may have thought of that as mostly a heating process, but it involves a lot of additives as well. We expect a lot of our tires, like 60,000 road miles of abuse before the steel belts show. Of course we almost never let them get that low on tread since they're simply not safe to drive well before then, but most of us hate to spend money until we absolutely have to do so. We pop in our cars, turn the key, and expect to go smoothly to wherever we want... for nearly forever.
Manufacturers try to keep us happy by selling tires that perform as close to reasonable expectations as possible. They know we'll be back for more. Where we buy them will depend on how the last set worked for us. So stuff gets added to the rubber, things like DPG, 6-PPD, and 6-PPD-quinone.
Yeah, I have no clue what those are either, nor what precisely they do for tire longevity and performance. But what is known is that those particular chemicals are toxic to mammals. You know, what we humans also are. In studies on rodents, they have found that these additives lead to decreased fertility in males and have neurotoxic and neuroinflammatory effects. They haven't been studied for their effects on humans yet. After all, who would volunteer? "Hey guys, we know these things are poisonous to rats, but who wants to give them a try and report back what your symptoms are?"
Ri-i-i-ight. Remember they haven't been studied in humans on purpose. But the thing is, humans have been eating them. In Switzerland they've started studying them, finding them in the food supply - and in the air - and in the water, including high mountain lakes.
Go back to the tires and that inconvenient part about them needing to be replaced. The rubber wears off in microscopic bits with use. It gets in the air, on the ground, in the water. It lands on fruits and vegetables, gets taken up in plant roots, gets inhaled by whatever breathes. They're even in pristine (?) mountain lakes and rivers. They're everywhere.
Yummy!
Now alerted, while scientists have commenced to study how it's affecting us - though I'd imagine the first hurdle is separating out those rare people who may not have been exposed, off in some isolated corner of the world where tires are not used - we have to start thinking about how to minimize exposure. One way might be to no longer put those chemicals in rubber, but what happens to our tires then? Will they start falling apart on us? And under what conditions?
We could stop driving as a species. Uhh, camels, anybody? Horses and wooden-wheeled buggies? Lay rail everywhere and we have to walk all those places not on the lines? Sure, you bet, right away. It could be great for the environment too, but it just won't happen.
Those of us who don't bother to wash off our produce will have to start since the chemicals have been found on them. But as they're already in many of them it's only a tiny partial solution.
We could change our driving habits immediately, not by totally quitting but by doing it in a more tire friendly way. Fast starts and stops just make it worse. Ever heard the expression "lay rubber"? It's literal. You've seen the black streaks on the road. People get impatient, even angry, or their minds wander and they're surprised by that sudden reason to stop immediately running out right in front of the car. So we need to do better by giving ourselves more time to get where we're going, and consistently paying attention to all around us. (Put the damn phones down!)
Those are the kinds of things we could choose to do just for ourselves, and get twice the benefit from doing so. Meanwhile, it's a good thing that somebody's scientists are studying the problems to find out how much harm all that rubber is doing inside us. Our country's scientists won't be, or not soon.
But it's a pretty good bet we all are breathing, eating, and drinking rubber tires.
I'll take mine ala-mode please. How about a sprinkle of cinnamon?