We all know if you keep the food for a long time, it will soon be bad. However, in United States, a nutritionist get McDonald's "Happy Meals" to make an experiment to obtain opposite conclusion that burgers and potato bought one year ago even not degenerate.
On March 19th, according to British news media report, this experiment maker JoAnn lives in Denver, Colorado. This 62-year-old nutritionist is grandmother of 8 children, usually against the kids to eat junk food specially.
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McDonalds Recipes