If you want to know what makes a healthy diet, it is easy to get the information these days. Most of us know the basics, anyway: Say no to chips and soda; eat fresh fruit and vegetables instead. It's just a question of putting it into action in our day-to-day lives.
But do the items we have saved in our minds as "good for you," like fresh fruit, vegetables, or whole-grains and pulses, still live up to their reputation?
The short answer is "not necessarily."
"The mineral content has declined in a wide range of food," said David Montgomery, a geologist in the Earth and Space Sciences department at the University of Washington in the northwestern US.
The question is: why?
