Microplastics and High-Fat Diets Together May Intensify Liver Injury: Study

Microplastic exposure may significantly worsen liver damage caused by an unhealthy high-fat diet, according to a new study published in Science Advances.

Researchers found that mice exposed to polyethylene microplastics-the most common type of plastic used in products such as plastic bags and milk jugs-showed much greater signs of liver injury when they were also fed a high-fat, high-cholesterol diet. Blood markers of liver damage were more than twice as high in these animals compared with mice exposed to the same amount of microplastics while eating a standard diet.

The study highlights growing concerns about microplastics, which have become nearly impossible to avoid. Tiny plastic particles are now routinely detected in air, food, water, and even human tissues. Scientists wanted to understand whether these particles could worsen existing health risks linked to poor dietary habits.

To investigate, researchers exposed mice to equal amounts of microplastics over eight weeks while feeding them either a normal diet or a diet designed to mimic a severe form of fatty liver disease. The combination of microplastic exposure and an unhealthy diet resulted in substantially greater liver damage.

Using advanced imaging and genetic analysis techniques, the team identified specific areas within the liver where inflammation and cellular damage were concentrated. The researchers also discovered that a protein involved in fat metabolism and tissue repair may play an important role in how the liver responds to microplastic exposure.

Although the findings come from animal research and require confirmation in human studies, they suggest that microplastics may interfere with the liver's natural repair mechanisms and potentially contribute to the progression of liver disease.

REFERENCE: Jung, W., et al. (2026). Spatial transcriptome mapping identifies Ppara-Anxa2 cross-talk in microplastic-induced hepatotoxicity. Science Advances. DOI: 10.1126/sciadv.aec8681. https://www.science.org/doi/10.1126/sciadv.aec8681