StayCurious Metabolism

StayCurious Metabolism

Microplastics in My Heart: It’s Worse Than I Thought

Plastic is poisoning your heart and increasing your risk of heart attack, stroke and death by as much as 350%. Here's what you can do about it.

Nick Norwitz MD PhD's avatar
Nick Norwitz MD PhD
Nov 22, 2025
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Plastic is poisoning your heart and increasing your risk of heart attack, stroke and death by as much as 350%.

I know… I know… At this point, warnings about plastic can feel like background noise.

You’ve seen the sea turtle. You’ve heard about the floating island of trash. And if you’re like most people, you probably feel that familiar tug to look away — not because you don’t care, but because... what can you do?

Meanwhile, the numbers keep rising. Plastic production is set to quadruple by 2050 — up to 1.8 billion tons a year. And all that plastic? It doesn’t just disappear.

It breaks down into microplastics and even smaller fragments — microplastic and nanoplastics — that weave their way through our environment, and into our bodies and hearts.

So today, we’re resisting the urge to look away and instead zooming in on the science — on how microplastics and nanoplastics affect your cardiovascular system and heart disease.

And — critically — what we can do about it.

So, here’s my challenge to you: Put the fear in a box. Set it aside. And let’s turn an eye to the data.

In this letter — available exclusively to premium subscribers — we’re diving into the unsettling world of microplastics. We’ll start with the horror, then move toward hope.

Premium subscribers get full access to my deep dives into cutting-edge metabolic research for less than $1/letter, 3 per week. You’ll always walk away with at least one new insight about metabolic health.

In what’s to come, we’ll:

  • Discuss a landmark study linking microplastic exposure to a 350% higher risk of heart attack, stroke and death.

  • Unpack the biological mechanisms behind those findings.

  • Share high-yield, actionable solutions — including a new innovation that just hit the market.

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