Bryan Johnson· Author
A French study tracking 1,925 people over 15 years found that ingesting more than 0.1 mg/day of aluminum in drinking water correlated with higher rates of cognitive decline and dementia.
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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.
A French study tracking 1,925 people over 15 years found that ingesting more than 0.1 mg/day of aluminum in drinking water correlated with higher rates of cognitive decline and dementia.
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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.
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