Bryan Johnson· Author
There’s no evidence that inhaling CO₂ boosts metabolism or energy.
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We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
There’s no evidence that inhaling CO₂ boosts metabolism or energy.
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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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