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 reason we have two sites of release is because these neuro chemicals do not cross the blood-brain barrier. And so waking up the body with adrenaline and waking up the brain are two separate, so-called parallel phenomena.
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.
Cortisol can cross the blood-brain barrier because it's lipophilic. Meaning it can move through fatty tissue. And we'll get into the biology of that in another episode. But cortisol in general is released and has much longer term effects. And as I just told you, can permeate throughout the brain and body. Adrenaline has more local effects. Or at least is segregated between the brain and the body.