Mr. Smith presents with a complaint about his knee, and while solving his knee problem, you decide to tell him that his nutrition intake is wrong and he needs to change his eating habits. Mrs. Jones presents with upper respiratory congestion, and during the course of managing her problem, you decide that her blood workup shows some flaws that could be dealt with by changing her eating pattern. John J. comes into the office wanting you to help him overcome his weight problem, so you start the measurements: number of calories taken in, percent of protein taken in, types and amounts of fat taken in, etc., and wind up with a complex diet revolving around a bunch of numbers of different nutrients...
Grosz R. Commentary: Just Why Do We Eat What We Eat?. The Internet Journal of Allied Health Sciences and Practice. 2016 Jan 01;14(1), Article 3.