Study busts some medical myths

First up: sugar doesn't make kids hyperactive. When scientists gave kids what they thought were sugary treats, even the parents perceived hyperactivity -- even though the treats were sugar free.

Another myth is you don't lose 40 percent of your body's heat through your head. The true figure is probably close to 10 percent.

And lastly there is no true cure for hangovers. Not greasy foods, not "hair of the dog." So go easy on the alcohol at holiday parties.

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