Andrew Huberman· PhD
L-arginine is the more direct pathway, but it's very low bioavailability. L-citrulline converts to L-arginine, but it lasts much longer in the bloodstream, which is why people tend to use L-citrulline.
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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.
L-arginine is the more direct pathway, but it's very low bioavailability. L-citrulline converts to L-arginine, but it lasts much longer in the bloodstream, which is why people tend to use L-citrulline.
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.
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