The calorie is just so fucking convenient. Its a number. Its easy to compute. Its easy to track...
And there is nothing equivalent anywhere to be seen.

A cucumber grown organically in your yard.
A cucumber grown in a local farm.
A cucumber gown half way around the world.

These three look identical, and have the exact same calories.
But, current nutritionists are finding their nutrition values wildly different.

Eating foods grown locally seems to be very important. Many surmise that it has to do with the local magnetic vibration, and the foods grown in it are much more nourishing for your body.

... so, anyway, I look forward to real studies of food and real studies of healthy people. We have done too much research into what is wrong in diets, and almost none in what is right in diets. It would seem obvious that if we want to know what is healthy, start finding healthy people and correlate their diets with body types.