MCT oil is a special kind of oil that may be able to help you in your weight loss efforts. But how can oil, which is a fat, help with weight loss? Doesn't fat cause weight gain? Not exactly. MCT oil refers to the length of oil and it is this length that impacts how your body burns it for fuel. Certain types of MCT oils can actually help with weight loss by increasing your metabolism and helping your body burn fat as a fuel source. Learn more about which types of MCT oil you should use here.