If you read about diffusion of innovation, there is the classical example that cure for scurvy was known way before being adopted: thttps://web.archive.org/web/20151022041843/http://www.idlewo...
Particularly striking was how concurrent innovations like copper tools, steam boats, and milk pasteurization derailed only partially developed scurvy theory. One wonders if this story partly inspired Woody Allen's joke in _Sleeper_ about steak being found to be good for you.[1] { Probably more the constant thrashing about of recommendations that has infected nutrition science since forever, though. }