One way to check if there is in fact some truth to a bit of folk wisdom / superstition is to see how universal it is. I was born in Russia, and have never hear

One way to check if there is in fact some truth to a bit of folk wisdom / superstition is to see how universal it is. I was born in Russia, and have never heard about the sugar+hyperactivity thing before moving to Canada. At the same time, nearly everyone back in Russia is sure that going out lightly dressed in cold weather will make one sick, and this seems to be news to Canadians.