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.
But nonetheless, changes in melatonin, meaning changes in the duration of melatonin release across the year are normal and healthy. So provided that you're not suffering from depression, it's going to be healthy to somewhat modulate your amount of indoor and outdoor time across the year.
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.
what it means is that in short days, because there's very little light on average landing on these cells, the duration of melatonin release will be much longer because as I mentioned before, light inhibits, it shuts down melatonin. Whereas in the summer months, much more light on average will land on your eyes, right? Because days are longer. Even if you're spending more time indoors, on average, you're going to get more light to activate these cells. And because light shuts down melatonin production, what you'll find is that the duration of melatonin release for the pineal is much shorter.