Dr. Sears suggests, if eating meal components, separately - to eat Protein first, then Fats, then the Carbohydrates.
I came across a link to a rather deep, scientific paper. Too much for me.
Fortunately, the abstract was written well:
"Food intake can be modulated through mu-opioid receptors (MORs, which also bind morphine) on nerves found in the walls of the portal vein, the major blood vessel that drains blood from the gut. Specifically, stimulating the receptors enhances food intake, while blocking them suppresses intake. Investigators have now found that peptides, the products of digested dietary proteins, block MORs, curbing appetite. The peptides send signals to the brain that are then transmitted back to the gut to stimulate the intestine to release glucose, suppressing the desire to eat."