The Devious Ad Campaign That Convinced America Coffee Was Bad for Kids - Jordan Weissmann - The Atlantic:
"As Smithsonian's Joseph Stromberg recently explained in great piece of pseudoscience debunkery, the idea that coffee is bad for youngsters was actually a myth first propagated by the early 20th century cereal Tycoon, C.W. Post.
Before he developed his signature breakfast products like Grape Nuts, Post went into business in 1895 selling a cereal-based, caffeine-free coffee substitute called Postum.
Now, the words "cereal-based, caffeine-free coffee substitute" might sound about as appetizing to you as a wet wad of newspaper.
But Post cannily marketed his product as a health beverage while spooking consumers about the allegedly malign effects of coffee on both adults and children. "