According to Wikipedia:
Adolf Frederick died suddenly in Stockholm on 12 February 1771 with symptoms resembling either heart failure or poisoning. Popular stories about his death having resulted from a large meal (consisting of lobster, caviar, sauerkraut, kippers and champagne as well as 14 helpings of his favourite dessert hetvägg of semla pastries and hot milk) are considered propagandist by modern writers.
Very historically accurate if I say so myself.
