Can microplastics from food and water get into your brain and increase stroke risk?

What's actually in it

Microplastics from food packaging, bottled water, seafood, and household dust are swallowed daily. From the gut, the smallest particles cross into the bloodstream and travel to the brain. The blood-brain barrier is supposed to block foreign particles, but nanoplastics are small enough to slip through.

Once in the brain, these particles interact with the delicate blood vessels that supply oxygen and nutrients to brain cells.

What the research says

A 2026 review in Adv Sci examined how microplastics travel from the gut to the brain and the damage they cause along the way. The review found that microplastics disrupt the gut-brain axis, damage the blood-brain barrier, and promote neurovascular dysfunction that increases stroke risk.

The particles cause inflammation in brain blood vessels, weaken vessel walls, and promote the formation of blood clots. They also disrupt the gut microbiome in ways that produce inflammatory signals reaching the brain through the vagus nerve.

The combined gut and brain effects create a double hit. Your gut sends inflammatory signals to the brain while plastic particles simultaneously damage brain blood vessels from the inside. Reducing daily microplastic intake by choosing glass and steel over plastic for food and water is the best available protection.