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Assume it's bad until proven otherwise.

Thought experiment: How would you go about proving that water is not bad?

Put a human in a beef jerky dehydrator for a few days?

Water is bad for you in doses that are trivial to acquire and consume. You've seen a pint glass before? Drink 12 of those in under 3 hours if you want to give yourself water poisoning and end up in the emergency room.

However we can also demonstrate that water is good for you in moderate doses. We have yet to demonstrate that any amount of plastic is good for you.

You can't prove safe, you can only prove "no harms we know of yet."

You can require companies to do at least some due dilligence, though, to give a reasonable amount of comfort it is. "It's safe" is a falsifiable claim.

But that could change over time with further understanding. No point panicking today over something not known to be harmful. The effect size is clearly very small. If I wanted to better my health in an actually measurable way I'd be much better served by dropping alcohol and refined sugars than worrying about microplastics.

> But that could change over time with further understanding.

That's not a good excuse not to bother at all. It's an argument for periodic reassessment of common additives.

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