MCTs have antiviral and antibacterial properties and there is some evidence that they may help balance gut bacteria and combat pathogenic bacteria. They also offer the digestive system a break because they are so easily utilized by the body. When used with a healthy diet and other ways to support gut bacteria, MCTs may help improve gut health over time. (Though regular coconut oil may be more effective for this, see below).
Furthermore, the participants who ate the low-carbohydrate diet lost an average of 0.8% body fat while those that ate the low-fat diet gained an average of 0.7% body fat.  This suggests that a higher fat diet may improve may lead to more favorable changes in body composition. Subjects in both groups notably reduced their waist circumference.  However, the reduction was greater for the low-carbohydrate group. 
And monounsaturated fat isn't the only thing olive oil has going for it nutritionally. Some olive oils come with phytonutrients that may offer their own disease protection benefits (still, it's not clear whether most of us can take in enough of these phytonutrients without going overboard on olive oil, says Joyce Nettleton, DSc, RD, researcher and editor of the PUFA Newsletter).