A groundbreaking new study from UC Riverside suggests the far-reaching impact of microplastic pollution may extend beyond direct exposure,possibly affecting the metabolic health of future generations. Researchers have, for the first time, linked a father’s exposure to these ubiquitous particles-found in everything from marine life to rainfall [[1]]-to an increased risk of metabolic disorders in their offspring, raising new concerns about the long-term consequences of plastic contamination. The study, published in the *Journal of the Endocrine Society*, highlights a previously unknown pathway for epigenetic inheritance of health risks.
Atlanta, GA – A new study using animal models suggests that exposure to microplastics may not only impact individuals directly exposed, but could also affect the health of future generations. This research highlights the growing concern over the potential long-term consequences of widespread plastic pollution on human health.
Published in the Journal of the Endocrine Society, the study is the first to link a father’s exposure to microplastics with an increased risk of long-term metabolic disorders in their offspring (the first generation, or F1). Microplastics are defined as plastic particles less than 5 millimeters in size, originating from the breakdown of consumer products and industrial waste.
To induce metabolic changes, researchers fed the F1 generation a high-fat diet, mimicking common unhealthy eating patterns. This approach was used to better reveal the potential impact of paternal microplastic exposure, which might not be apparent under normal dietary conditions.
The results showed that female offspring from fathers exposed to microplastics were more susceptible to metabolic disorders compared to those whose fathers were not exposed, even though all offspring received the same high-fat diet.
“The exact reason for this sex-specific effect remains unclear,” said Changcheng Zhou, professor of biomedical sciences at the UC Riverside School of Medicine and the study’s lead author, as quoted in Good Men Project on January 25, 2026.
Zhou explained that female offspring exhibited symptoms resembling diabetes, while a similar effect was not observed in male offspring.
“In our study, the female offspring developed a diabetic phenotype. We observed increased expression of pro-inflammatory and pro-diabetic genes in their livers – genes previously linked to diabetes. These changes were not seen in the male offspring,” he stated.
The research team also found that male offspring did not develop diabetes, but did show a small, yet significant, decrease in fat mass. Conversely, female offspring experienced a decrease in muscle mass alongside the increased signs of diabetes.
To investigate the underlying mechanisms, researchers utilized PANDORA-seq technology and discovered that microplastic exposure could alter the “cargo” within sperm, including small RNA profiles that regulate gene expression during development.
“To our knowledge, our study is the first to demonstrate that paternal exposure to microplastics can affect small non-coding RNA profiles in sperm and lead to metabolic disorders in offspring,” Zhou explained.
Zhou believes these findings open a new perspective in environmental health, suggesting that plastic pollution exposure could leave a biological footprint on subsequent generations.
“Our findings open new horizons in environmental health, shifting the focus to how both parents’ environments contribute to their children’s health,” he said.
He also suggested that the study’s results in mice may have implications for humans, particularly men planning to have children.
“The findings from this mouse study likely have implications for humans. Men who are planning to have children should consider reducing their exposure to harmful substances like microplastics to protect their health and the health of their future children,” Zhou said.
The research team plans to continue their investigation to determine if maternal environmental exposure also poses similar risks.
“Future studies will likely examine whether maternal environmental exposure produces similar risks and how these metabolic changes can be mitigated,” Zhou concluded.
(luc/luc)
