What's behind Bryan Johnson's claimed 85% microplastic drop?

Let's not sugarcoat it: you probably have microplastics inside you right now. I know, I wish that was an exaggeration. But billionaire-biohacker Bryan Johnson—the guy who literally makes optimizing his body a full-time job—found out his blood and other fluids had microplastics floating around too^[1]. The wild part? After making a lot of lifestyle changes (including ditching his nonstick pans), his test showed microplastics went from 15 to just 1 particle. That's around an 85% drop, by Johnson's own account. The therapy he thinks is most responsible for this reduction is sauna—which he says also eliminated other environmental toxins linked to plastics (200°F, 20 min daily). He also avoided the big no-no's like microwaving in plastic, plastic cutting boards, and non-stick pans, and added a reverse osmosis water system.

So… what's going on in our kitchens? Are our supposedly "safe" pans dropping invisible plastic bits into our food? Here's why Johnson's claimed results are setting the internet (and scientists) abuzz.

How do nonstick pans leak microplastics into your food?

Ever noticed how "nonstick" pans get a little less nonstick over time? That's the PTFE (yep, Teflon) coating wearing down. Turns out, every scrape from a spatula and every high-heat sizzle chips off tiny particles—some big enough to see, many too small for the naked eye^[1]. And these slivers? They don't just disappear. They swirl around in your scrambled eggs. You eat them. Your body tries to deal. The result: microplastics building up where you really, really don't want them. (For a deeper look at why PFAS and PTFE coatings matter, see our guide to PFAS-free cookware in India.)

What does the science say about PTFE particles in human blood and organs?

Here's the stuff that makes you want to clean out your cupboards right now—a 2025 pilot study found PTFE particles not only in human blood, but inside children's tonsil tissue^[5]. Deep inside tissue. That means these plastics may be crossing from your food, through your gut, and ending up places they should never be. And it's not just one study. The more researchers look, the more they're finding evidence that microplastics slip into cells and might even affect how genes are expressed^[5][6].

Why did Johnson's kitchen makeover make such a big difference?

Look, Bryan Johnson isn't your average health nut. The guy's running "protocols" most of us can't even pronounce. But his kitchen changes were surprisingly simple—and he says they packed some of the biggest punch. Tossing every PTFE-coated pan. Swapping plastic food containers for glass. Not microwaving leftovers in plastic^[1]. He stacked that with things like daily saunas and blood filtering. But if you take one thing from his results, it's this: that sneaky PTFE coating in nonstick pans is, by his account, likely a big source of microplastics^[1].

How can you cut microplastics in your own kitchen without going extreme?

• Swap out nonstick pans for ceramic. Asai ceramic cookware has no plastic coatings and no PTFE to leach at high heat.
• Chuck the plastic containers. Go for glass (or at least use glass for reheating meals).
• Filter your tap water. Reverse osmosis is the gold standard, but even a basic pitcher filter can help.
• Skip synthetic fabrics where you can. Less plastic in your home means less in your food and your body^[1].

Which cookware swap wins: ceramic, cast iron, or Teflon?

Alright, cookware. This is where folks get heated (pun intended). Cast iron's classic. Teflon's easy. But ceramic? Ceramic is the hero nobody talks about. Here's why:

• No plastic at all—so nothing to chip, melt, or flake into your food.
• Naturally nonstick without needing fluorochemical coatings.
• Handles everyday Indian-kitchen heat like a champ.

So if you're thinking about tossing your battered old pan, ceramic is absolutely the way to go. You'll cook safer, and cleanup's a dream compared to worrying about a razor-thin nonstick layer. At Asai, our range of ceramic pans is built on a Swiss-grade Procera ceramic coating that is 100% free from PFAS, microplastics and 70+ hidden toxins. Explore our ceramic cookware collection, and see the independent lab results on the Asai Lab evidence page.

Are microplastics in nonstick pans a real threat or just health hype?

Let's cut through the noise. Yes, you're probably getting microplastics from a bunch of places—water, food wrappers, maybe that old takeout container. But if you're cooking at home a lot? Nonstick pans are a hidden, sneaky source nobody talks about. The science behind this isn't pure hype: microplastics turn up in blood and organs in multiple studies, and Bryan Johnson's blueprint suggests ditching PTFE products made a measurable difference in his own tests^[1][5]. Could more data come out? Of course. But the signal's already there, and not just for biohackers.

What do experts and biohackers want you to know about staying safe?

Here's what stuck with me after reading Johnson's journey and the science: we're all "kind of flying blind" when it comes to microplastics^[4]. Even the labs can barely test for them. So being proactive—in ways you can actually control—just makes sense. Researchers from Stanford and the University of Chicago say the risks are real enough to start limiting exposure, even while the details are still being worked out^[5][6]. And swapping out your cookware? Low effort, high reward.

"We're kind of flying blind, like all 8 billion of us on earth, when it comes to microplastics."
— Bryan Johnson^[4]

The bottom line

So many of us worry about the wrong plastics. Meanwhile, we stir soup, flip pancakes, and never think twice about what's flaking off our pans. Bryan Johnson's test wasn't magic or billionaire trickery—by his account he just found a quiet kitchen switch (ditching PTFE-coated pans) that cut a clear chunk of microplastics from his body. And the best news? You can make the cookware part of that change today, no lab required.

If you want a kitchen swap with real-life impact, focus on your nonstick—pick PFAS-free ceramic. Your body (and maybe your future doctor) will thank you.