Environmental exposure pathways of microplastics and their toxic effects on ecosystems and the nervous system

Microplastics are no longer just an environmental problem — they're a neurological one. In this episode, we explore how plastic particles smaller than five millimeters enter our bodies through food, air, and even medical procedures, then make their way past critical barriers to reach the brain. You'll learn about the multiple pathways these particles take to cross from gut to bloodstream to nervous system, and what happens when they accumulate in developing and adult brains. We break down six mechanisms through which microplastics may damage neurons, from disrupting neurotransmitters to triggering inflammation, and examine evidence linking exposure to cognitive decline and neurodegenerative disease. This is the science behind a modern pollution crisis that's literally getting inside our heads — and what researchers say we need to do about it.