Are there microplastics in store-bought packaged milk?
Yes. A 2026 study from India found more microplastics in processed packaged milk than farm fresh milk, with LDPE pointing to packaging as one source.
What's actually in it
Milk can pick up microplastics before and after packaging. Possible sources include fodder bags, milking tools, processing equipment, caps, seals, and plastic packaging.
Packaged milk can also sit in plastic or plastic-lined containers before you buy it.
What the research says
A 2026 study in Food and Chemical Toxicology tested farm fresh milk and processed packaged milk in India. Farm fresh milk had 17.78 microplastics per liter on average. Processed packaged milk had 37.78 to 71.11 microplastics per liter.
The main polymer in processed packaged milk was LDPE, which points to packaging material as a likely source. The study also found that farm fresh milk can contain microplastics from sources like fodder bags or milking tools.
This study does not tell us the level in every country or brand. It does show that packaging and processing can add to milk microplastic exposure.
What to do
Choose glass-bottled milk when it is available and affordable. At home, store opened milk or dairy in glass kitchen storage instead of plastic containers.