Microplastics: a quick beginners guideQuiet dignity + the demon of self-doubt (Issue #295)Published inThe Medium BlogSent as aNewsletter3 min readJust now--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 youd rather live in blissful ignorance about your plastic usage, maybe dont 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 youd expected to find them):Chart: F. Perry WilsonBlood vessels in your brain are lined with a highly selective membrane (the blood-brain barrier). Its 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, youd have a sandwich bags worth of plastic. Heres 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 someones 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; its 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 isnt 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, hes 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 recommendDrink water from glass instead of plastic.Use ceramic or stainless steel dishware.Store food in glass or stainless steel instead of tupperware.Dont 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 Flanzraichs full story. Harris Sockel Good quotesWe 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 wisdomWhen bad things happen, ask: Did the negative event force you to grow or do something you otherwise wouldnt have had the courage, urgency, or motivation to do? If so, it wasnt all bad. (May Pang)