Bryan Johnson· Author
The balance between obtaining vitamin D from sun exposure and protecting the skin from UV damage is complex, but sunscreen remains an important tool in skin cancer prevention [7][10].
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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.
The balance between obtaining vitamin D from sun exposure and protecting the skin from UV damage is complex, but sunscreen remains an important tool in skin cancer prevention [7][10].
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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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