Fat can contribute to satiation depending on the type. Saturated fats have been found to have the least impact on satiation. Medium Chain Triglycerides (MCT) in a mixed meal have been found to help reduce snacking within the next hour or two. Polyunsaturated fats have been found to help reduce the amount of eating in the next meal (less eating four-five hours later). Fats in combination with fiber, especially more viscous or water-soluble fiber, also seemed to help with satiation.
Coconut oil and palm kernel oil are natural sources of MCT fats. MCT is easier to digest for people with chronic malabsorption or gallbladder issues but MCT can not be the exclusive fat source in a diet plan because excessive amounts of it can increase intestinal symptoms. MCT fats are quickly available to the liver and may help support liver mitochondrial health which may help protect the brain because in times of acute or long term starvation the liver mitochondria can produce ketones for an energy source for the brain. The brain can only use glucose or ketones for energy, it can not survive on stored fats for energy. Ketones can be made out of protein.
http://www.ncbi.nlm.nih.gov/books/NBK53550/ – on types of fat and satiety.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3219306/ – on ketones and brain injury.
(This information is for educational purposes. Please see an individual health care professional for individualized health care purposes. I am a dietitian and do not recommend or follow the Paleo diet myself but I value info when I find a source that seems well researched and is concise. )
This was written as a comment for an article on why paying more for whole foods might be more budget friendly in the long run. Tight Budget? Science Says It Still Makes Sense to Buy Pricier, Natural Foods, http://www.inc.com/tom-popomaronis/tight-budget-science-says-it-still-makes-sense-to-buy-pricier-natural-foods.html. but I couldn’t get logged in to get the comment to ‘Submit’ — so I submitted/gave up and copied it here.