Bryan Johnson· Author
Muscle Volume: With a muscle volume of 18 liters, I am in the 100th percentile for muscle mass, ahead of 99.9% of men my age.
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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.
Muscle Volume: With a muscle volume of 18 liters, I am in the 100th percentile for muscle mass, ahead of 99.9% of men my age.
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.
Fat in Muscles: At 4.3%, I rank in the lowest percentile, better than 99+% of men my age. Significance: Muscle volume is a major predictor of wellness and longevity. Lower fat in muscle correlates with improved muscle function and strength, the most important muscle attribute for longevity.