People Who Drink Bottled Water on a Daily Basis Ingest 90,000 More Microplastic Particles Each Year

Paywall. But also genuinely curious, is 90,000 micro plastics in a year a lot? Are there levels where we start to be more concerned? How does this compare to other sources of ingestion?

I need to look back into this, back when I first did there weren't a lot of links to actual poor health outcomes, but I feel like I've seen some articles since which suggested that was the case.

"Key findings include the annual ingestion of 39,000–52,000 microplastic particles by individuals, with bottled water consumers ingesting up to 90,000 more particles than tap water consumers."

https://www.sciencedirect.com/science/article/pii/S0304389425018643?via=ihub

90000 of what? Kilograms?