Peter Attia· MD
and they're so small that they can penetrate into our lungs and why do we care about that size the 2.5 microns that's because it can get through our lungs and into our blood and it's dangerous
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
and they're so small that they can penetrate into our lungs and why do we care about that size the 2.5 microns that's because it can get through our lungs and into our blood and it's dangerous
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
These are particles that are sub 2.5 microns in the air. Obviously, you can't see these things. You don't feel these things, but because of how small they are when inhaled, these particles can go all the way into the bloodstream because of their ability to go straight down into the most distal part of the air sacks of the lung and cross the diffusion barrier where oxygen and CO2 are um are transmitted.