It isn’t just seafood that’s loaded with microplastic pollution. In a new study, scientists found microplastics in nearly 90 of sampled meats and meat-like alternatives – including seafood, chicken breasts, beef steaks, tofu, and plant-based burgers.

It’s become well-documented that seafood is often tainted with the presence of microplastics due to the shockingly high quantities of plastic in the planet’s oceans. For instance, a 2017 review found that regular eaters of fish and shellfish could be ingesting up to 11,000 microparticles a year.

However, until now, there’s been relatively little research into the prevalence of plastic in terrestrial protein sources, like beef and chicken.

To pry into the issue, scientists at Ocean Conservancy and the University of Toronto sampled 16 protein types, including highly processed protein products and minimally processed “fresh” products.