When a friend of mine was commissioned to write a 2,000-word article on healthful eating for a popular magazine, she said she just wanted to write “Eat a balanced diet” 500 times.But of course it’s a lot more complicated than that.Oh wait, no it isn’t.It’s true that the human body is complex and that to perform at our absolute peak we need a bunch of different nutrients: carbohydrates, protein and fat, to be sure, but also zinc, potassium, sodium, vitamins A through E, trace amounts of gold, ...

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