Can microplastics from plastic products contribute to clogged arteries?

What's actually in it

Microplastics enter your body through food stored in plastic containers, water from plastic bottles, and even the air you breathe indoors. Once swallowed or inhaled, the smallest particles can cross from your gut or lungs into your bloodstream. From there, they travel to every organ, including your heart and blood vessels.

Scientists have now found microplastic particles physically embedded inside atherosclerotic plaques, the fatty buildups that narrow arteries and cause heart attacks.

What the research says

A 2026 review in Trends Cardiovasc Med pulled together the evidence on how microplastics drive atherosclerosis. The review identified several ways these particles accelerate plaque growth.

First, microplastics trigger chronic inflammation in blood vessel walls. Immune cells treat plastic particles as foreign invaders and mount an ongoing attack, releasing inflammatory chemicals that damage the vessel lining. This damaged lining becomes a magnet for LDL cholesterol, which seeps in and forms the core of a plaque.

Second, microplastics cause oxidative stress inside artery walls, creating reactive molecules that damage cells and make existing plaques less stable. Unstable plaques are more likely to rupture, causing a sudden heart attack or stroke.

Third, the review found that microplastics can carry other pollutants like heavy metals and persistent organic pollutants on their surface, delivering a concentrated toxic dose directly to the artery wall.

Cutting plastic out of your food and water routine is the most direct way to reduce the microplastic load in your blood. Glass water bottles, stainless steel food containers, and avoiding plastic-wrapped foods all help.