I'll bite. Net caloric balance is an important predictor, but not the sole predictor. That's why it "drives people nuts" - because it is not true. For example

I'll bite. Net caloric balance is an important predictor, but not the sole predictor. That's why it "drives people nuts" - because it is not true. For example: http://www.newscientist.com/article/dn23127-abnormal-gut-bacteria-linked-to-severe-malnutrition.html http://www.newscientist.com/article/dn23127-abnormal-gut-bac...