Most of the research articles I've read about MCT and coconut oil say that a good percentage of the people that consume high amounts of MCT oil have gastrointestinal issues. Some people are unaffected. Probably an absorption problem from what it seems like...sorry, I don't have my journal to cite references.
That was one of my initial queries with MCT oils as well, because I know too much can cause such stomach ailments, and I wanted to see what the benefits to con ratio was...
Apparently there's not a lot of research to back of how well MCT oil works as a glycogen preservation method.