Adding pure fats to your diet that aren't part of the food like in steak or eggs, unless it is necessary for flavor, is just going to keep you tubby.
MCTs or medium chain triglycerides occur naturally in foods like coconuts.
Most fats or lipids are long chain hydrocarbons of 18,20, 22 linked carbons or more .
The MCT is the same basic structure but are only 8-10 carbons long.
This gives them the slow burning aspects of a fat BUT, they get digested via a different process.
Most carbs , especially simple carbs get broken down via release of insulin from the pancreas.
This is a rapid process that helps give you that quick spike in blood sugar.
Most fats break down much slower via release of bile from the gall bladder when they hit the upper intestine.
There is some evidence indicating that MCT use a 3rd form of digestive mechanism that I think involves the liver.
The idea is that MCT give you the stable burn of a fat without the slowest process .
Thus, you get the best of both carbs and fats.
In my case, I couldn't digest and tolerate many MCT's after several attempts.
I got "the runs" and felt queezy, so for me, it was a failure .