"Estimates of the number of calories in different kinds of foods measure the…

Reshared post from +Jennifer Ouellette

"Estimates of the number of calories in different kinds of foods measure the average number of calories we could get from those foods based only on the proportions of fat, carbohydrates, protein and sometimes fiber they contain (In essence, calories ingested minus calories egested). A variety of standard systems exist, all of which derive from the original developed by Wilbur Atwater more than a hundred years ago. They are all systems of averages. No food is average." http://blogs.scientificamerican.com/guest-blog/2012/08/27/the-hidden-truths-about-calories/