The problem with this is that it could take decades to become dangerous. Maybe accumulation is a factor. Maybe interaction with other things is.

It's hard to assess, and I'd find it saner to assume ingesting regularly inorganic synthetic materials our body did't evolve with to be risky and take measure before we know for sure.

Even if it's just because of intertia: it took almost a century between knowing that asbestos was dangerous and ban. So let's not wait.