That is a mistranslation. It wasn't cinnamon buns, it was hetvägg, a type of cardamom bun swimming in sweetened hot milk/cream.

https://en.wikipedia.org/wiki/Adolf_Frederick_of_Sweden#Death

14 cinnamon buns would be rookie numbers

It said "after" not "because" and not "died of a surfeit of cinnamon/cardamom buns"

Maybe he was actually suffering from a cardamom deficiency and couldn't eat ENOUGH buns in time to save his life

Weirdly similar experience - one time in the college cafeteria, where the policy was take all you want but eat all you take, I ate 12 desserts for lunch. The portions were small. I stopped at 12 although I was sure I could eat one more, because I wasn't sure I could eat two more and stopping at 13 seemed unlucky. Apparently King Adolf lacked my superior power of risk assessment.

As is often the case with oddball food stories, Max Miller of tasting history has done an episode about it

Baker’s dozen for a reason

It might not be a hard limit, 13 might be more like the LD50 of cinnamon buns, more data is needed.

Do not eat 14 cinnamon buns. You will surely regret eating 14 cinnamon buns.

Weakling

Someone send a few to Trump? That old fart has no self control.

So that's where we get the bakers dozen from..

13.9

A baker's dozen of Cinnabon probably won't kill you immediately. The renal failure, on the other hand...

We need a few more experiments before we can determine an LD50

To Cinnabon I go…

Did the buns kill him? Or did he just die of syphilis or something while on a bun binge?

Death goals.

And I thought two was too many