Experts have raised concerns following recent findings linking exposure to microplastics with an increased risk of heart disease. Researchers have discovered that regular interaction with microplastics may hasten the development of atherosclerosis, a condition that leads to the narrowing of arteries and is associated with strokes and heart attacks.
These minuscule plastic particles originate from various sources such as packaging materials, textiles, and common plastic products. They have permeated virtually all aspects of our environment, including the food chain, tap water, air, and even within human bodies.
Lead researcher Professor Changcheng Zhou, from the University of California, emphasized the challenge of completely avoiding microplastics but recommended reducing exposure by limiting plastic usage in food and water containers, minimizing single-use plastics, and avoiding heavily processed foods to safeguard cardiovascular health.
The study, published in the Environment International journal, focused on investigating the effects of microplastics on laboratory mice. Male and female subjects were fed diets similar to those of healthy humans and then exposed to daily doses of microplastics over a nine-week period.
The research findings, reported by Science Daily, revealed a significant increase in atherosclerosis, specifically in male mice, aligning with levels that humans could realistically encounter through contaminated food and beverages. Atherosclerosis manifested as arterial constriction and stiffening, impeding blood flow.
Male mice exposed to microplastics exhibited a 63% increase in plaque in the aortic root and a 624% increase in plaque in the brachiocephalic artery. In contrast, female mice did not show significant plaque development under the same conditions.
Professor Zhou highlighted the gender-specific response observed in the study, suggesting potential roles of sex chromosomes and hormones, particularly estrogen’s protective effects. Notably, the microplastics did not induce weight gain or elevated cholesterol levels in either gender, indicating that other factors were contributing to the arterial damage.
The research team stressed the need for further investigations to understand the heightened vulnerability of males and to determine if similar effects are present in humans.