Most people worried about microplastics are focused on the wrong things.

The receipts, the water bottles, the plastic cutting boards. Dr. Matt Campen has spent his career actually measuring what ends up in the human body, and the picture that's emerging looks a lot less like a consumer choice problem and a lot more like a food system problem.

Dr. Kevin White sits down with Dr. Campen, a toxicologist and environmental health researcher at the University of New Mexico, to talk through what the science actually shows: where microplastics accumulate in the body, why the brain appears to hold more than any other organ, what his lab found when comparing plastic concentrations in healthy brains versus those with dementia, and why the biggest exposure vector isn't your water bottle. It's processed food, irrigated by groundwater running through plastic-contaminated agricultural fields.

They also get into wildfire smoke as a largely overlooked driver of neuroinflammation, and why the recovery window is longer than most people realize.

"I worry that the United States may end up being sentinels for the rest of the planet on what the health effects of microplastics are."

This isn't a conversation about panic or dismissal. It's an honest look at where the science actually is, what it means for brain health and longevity, and why solving this one is going to take more than switching to a stainless steel bottle.

Find Dr. Campen on LinkedIn.

Instagram: @kevinwhitemd
YouTube: @kevinwhitemd
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