Endorphins are natural produced internal "like" signals, and signal the desire for more. The receptors become damped with use, and take time to clear. While the receptors are damped, it takes more to reach the same level of sanitisation.
Enter exorphins, the foreign source of equivalent to endorphins, all the receptors know is we like, we want more. Our food intake becomes instantly in excess of need. Our food intake is being encouraged beyond our need, by the exorphins. We soon start to store fat, and the insulin driven storage starts. We begin to overeat because we are getting fat, in-addition to the exorphin driven desire.
The repair is to remove all (most) exorphins from our food intake. A1 - caseins, and gladin peptide are two of the naturally occurring exorphins. But wait, the food science guys saw another use of these, to increase sales. These are being used as flavour enhancers, and are being added to processed food and even "pink slime", aka finely ground meats. Therefore any processed meat, any processed food will likely have exorphins to encourage consumption.
Where does this leave us? No processed foods, whole food diet, harcome, Paleo, low carb or not.