You can’t see them, but small particles of plastic are all around you ― in the air you breathe, the water you drink, even the foods you eat.

A new paper that compiles data from previous studies estimates that each year, the average American consumes over 70,000 minuscule pieces of plastic that make their way into our food through packaging, manufacturing and being swept up in the food chain. That’s more than 200 pieces a day.

Published Wednesday in the journal Environmental Science & Technology, the research looked at 26 older studies that examined the amount of microplastics in seafood, honey, salt and sugar, as well as beer and water. Researchers then estimated the amount of these foods we’re supposed to eat, based on nutrition guidelines from the United States Department of Agriculture. They wrote that about 39,000 to 52,000 microplastic particles a year come from these foods, depending on a person’s age and sex.

Those figures climbed to over 70,000 once the researchers factored in data on how much plastic we inhale as we breathe.

Drinking bottled water instead of tap water accounted for an additional 90,000 more pieces of plastic a year, the research found.

But the study noted that these numbers probably vastly underestimate the amount of plastic we unwittingly ingest day to day. The foods in the research account for only 15% of the American diet. The data did not include things like snack foods, which come packaged in plastic and ready to eat ― meaning we might be consuming far more plastics than what the research shows.