What's the danger of an all-fruit diet?

After learning that Ashton Kutcher had landed in the hospital trying to follow Steve Jobs' all-fruit diet, CNN reader Sumday had just one question: "All I really wanted to know was why this diet was bad?"

Source: http://rss.cnn.com/~r/rss/cnn_health/~3/lsxtSOezw78/index.html

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