Bryan Johnson· Author
It measures your speed of aging and the age of eleven critical organs.
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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.
It measures your speed of aging and the age of eleven critical organs.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
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.
Nearly every day, I'm doing one test or another. Today, I'm doing an at home blood test to track my speed of aging. This test will reveal how fast or slow I'm aging and also the biological age and health of 11 key organ systems including the heart, brain, liver, immune function, and more.