Okay so it was dietary fat. So in the above link where the owner of ketonix wants to increase his blood Acetone, this device would drive him to eat MCT's. Good. That a nice, neat, data driven use of cause and effect.

"Second, MCT don't get stored in fat cells," I'm not so sure about that. MCT's would probably be treated like any other dietary triglyceride and be converted to monoglyceride and free fatty acid. Now I could certainly see that short chain FFA's would be used quickly but they would also be able to pass into fat cells and be reassembled into longer chain triglycerides.