Study Finds Polyethylene Microplastics in Food Packaging May Worsen Fatty Liver Disease

Aug 6, 2026

A pioneering study published in Science Advances reveals that polyethylene microplastics, commonly found in food packaging, contribute to fatty liver disease and disrupt the liver's natural repair mechanisms. Led by Dr. Adi Joshi of Texas A&M University, researchers used spatial transcriptomics to show that polyethylene activates the fat-regulating protein PPAR-alpha and alters the tissue-repair gene ANXA2. The study demonstrates that these microplastics significantly exacerbate liver damage when combined with a high-fat, high-fructose Western diet.

Polyethylene microplastic liver toxicity

▪A study published in Science Advances on June 17, 2026, found that polyethylene microplastics contribute to fatty liver disease in laboratory mice and disrupt the liver's natural defense and repair mechanisms.
▪The study on polyethylene microplastics revealed that the plastic activates PPAR-alpha, a protein regulating liver fat production, and alters ANXA2, a gene involved in tissue repair.

Fatty liver disease prevalence

▪According to the American Liver Foundation, fatty liver disease affects approximately 25% of the global population.
▪A separate human study detected microplastics in the cirrhotic liver tissue of patients with cirrhosis, whereas healthy liver tissue samples tested negative.

Diet microplastic synergistic effects

▪Dr. Adi Joshi stated that individuals consuming foods like burgers and sodas may have a greater chance of progressing to fatty liver disease if exposed to polyethylene.
▪The researchers found that polyethylene microplastics exacerbate liver damage when combined with a Western-style diet high in fat, fructose, and cholesterol.

Spatial transcriptomics research methodology

▪To map the precise locations of liver damage, researchers from Texas A&M University and the University of Oklahoma utilized spatial transcriptomics to examine gene expression within intact tissue.
▪The research team plans to use spatial transcriptomics in future studies to investigate whether polyethylene exposure contributes to advanced liver fibrosis and scar tissue buildup.

Food packaging exposure sources

▪A review published in Foods notes that heat, repeated use, sunlight, and mechanical wear cause polyethylene packaging to break down into microplastics that migrate into food.
▪Polyethylene accounts for approximately one-third of global plastic production and is a primary component of food packaging, plastic wraps, storage containers, and beverage cup linings.