Microplastics: a quick beginner’s guide

Quiet dignity + the demon of self-doubt (Issue #295)  
  
## The Medium Newsletter

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∙ March 25, 2025 ∙ 3 min read ∙ View on Medium

## Microplastics: a quick beginner’s guide

#### Quiet dignity + the demon of self-doubt (Issue #295)

A few weeks ago, while casually browsing the Medium app, I came across a story that made me stop drinking water from plastic bottles. (If you’d rather live in blissful ignorance about your plastic usage, maybe don’t read any further.) F. Perry Wilson, MD, associate professor of medicine and public health at Yale, covered a recent study on how nanoplastics — specks of plastic as small as 1 nanometer in width, or as long as a fingernail grows in one second — accumulate in the human brain.Researchers at the University of New Mexico collected tissue samples from around 30 recently deceased organ donors around the country. They examined each sample under a microscope, looking for microplastics — and found 5x more accumulated plastics in brain tissue than in liver and kidney tissue (where you’d expected to find them):_Chart: F. Perry Wilson_ Blood vessels in your brain are lined with a highly selective membrane (the “blood-brain barrier”). It’s designed to prevent toxins from entering the brain, but nanoplastics are too small for it to detect… so they easily pass through. If you were to accumulate all the tiny flecks of nanoplastics in the brain of one of these subjects, you’d have a _sandwich bag’s worth of plastic_. Here’s one speck:Source: Nihart et al. Nature Medicine 2025 via F. Perry Wilson _(That white dot above is a nanoplastic, likely a tiny bit of_ _polyethylene_ _, that has seeped through the blood-brain barrier into someone’s cortex.)_ As a companion piece, writer Derek Flanzraich explains how microplastics end up in our blood in the first place. Essentially, we ingest bits of plastic daily. We also inhale them (via household dust or offgassed fumes) and absorb them (via some cosmetics and skincare products). Plastic is everywhere; it’s inescapable.The giant unanswered question here: What exactly are microplastics doing to our bodies? Some studies have found they can cause inflammation, but results are mixed. Still, Wilson isn’t taking chances. Given that “those who drink most of their water via plastic bottles ingest an extra 90,000 particles of microplastics a year, compared to 4,000 [for those] who consume only tap water,” he’s trying to nix his plastic bottle usage going forward.Short of systemic solutions like limiting the use of plastics in manufacturing, if you (like me) are mildly risk-averse and want to reduce your personal intake, both writers recommend…

  1. Drink water from glass instead of plastic.
  2. Use ceramic or stainless steel dishware.
  3. Store food in glass or stainless steel instead of tupperware.
  4. Don’t microwave food in plastic containers (apparently this can create billions of microplastics in just a few seconds)

If you want to go even deeper, I recommend bookmarking Flanzraich’s full story._—_ _Harris Sockel_

###  💬 Good quotes

  * ”We misunderstand dignity when we imagine it requires grand gestures or public validation. The truth is more mundane and therefore more terrible: dignity persists in the smallest actions, in the private rituals we maintain when everything external has been compromised.” (Elina Kumra)
  * “I always understood (even before I had language to explain it) that these mixtapes represented my intellectual property — they were not simply songs thrown together randomly or in a sequence decided by some record company executive, but an attempt at meaning making.” (Mark Anthony Neal)
  * “Success is measured by how we face the Demon of self-doubt.” (John P. Weiss)



### ❓ A dose of practical wisdom

When bad things happen, ask: _Did the negative event force you to grow or do something you otherwise wouldn’t have had the courage, urgency, or motivation to do?_ If so, it wasn’t all bad. (May Pang)··· _Deepen your understanding every day with the Medium Newsletter.__Sign up here_ _.__Edited and produced by_ _Scott Lamb_ _ & __Carly Rose Gillis_ _Questions, feedback, or story suggestions? Email us:__tips@medium.com_ _Like what you see in this newsletter but not already a Medium member? Read without limits or ads, fund great writers, and_ _join a community that believes in human storytelling_ _._

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