Public Health Scene

Demand for bananas in Japan has skyrocketed, thanks to "The Morning Banana Diet." In the past few months, banana sales in Japan have increased 40 percent.

But nutritionists are calling it a fad diet.

"When you think about a diet, it needs to be a diet for life," Lisa Harnack, nutritional epidemiologist and associate professor at the University of Minnesota's School of Public Health, told the Star Tribune. "I'm not so sure eating bananas for breakfast is something you could do for the rest of your life."

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