Rowan Jacobsen

speaker

216 appearances 1 recordings 1 series first heard Jul 2026 last heard 27 Jul

Rowan Jacobsen’s voice in public audio — every appearance, attributed to the second.

Trend

recordings per month · last 12 months

Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

Appearances

newest first · ▶ plays the moment

Unexplainable · An argument for the sun · 27 Jul 2026 podcast

So then that pretty much got copied around the world, variations on that.

And sunscreens also changed.

So the broad spectrum sunscreens hit in the 1990s mostly that blocked both UVB and UVA.

And those are much more successful.

Oh, yeah.

Yeah, Pelle Lindqvist is an obstetrician in Sweden.

And one of his specialties is blood clots.

And blood clots tend to be more common in women when they're pregnant and right after they've given birth.

He had noticed that less inflammation meant less blood clots.

And he had a hunch that that was because of vitamin D. And he found this great data set called the Melanoma in Southern Sweden Study, which had tracked like 40,000 Swedish women for like 20 years.

It tracked all their health metrics.

including how much sunlight they got, because the focus was melanoma.

So they were trying to figure out what raised your risk of melanoma.

So they tracked all of their sun-seeking behaviors, I think is what they called it.

So we looked at the data and it turned out

It was true.

Like the women who spent the most time in the sunlight had higher vitamin D, lower risk of inflammation, and fewer blood clots.

More sunlight, fewer blood clots.

So then he started looking at other factors and it turned out it wasn't vitamin D. Like the connection with actual sun exposure was stronger than the connection with the vitamin D levels.

Right, and he had no idea what it was.

Showing 81–100 of 216 · page 5 of 11