Do a search for that as it has been discussed extensively in the past.
You have a few problems to overcome first with mct. Firstly, you have to get pure mct. You get some with additivies like most out there, you fucked when you inj it.
Then you have to make it sterile - filter, boil, add BA, etc. You have to trust yourself in making it sterile - personally I wouldn't.
Then after all that, the general opinion of people that have tried it has been negative - most have been very disspaointed with the results.
The only explanation I have behind the fact that proper SEO's like Syntherol, PnP, etc work so well comapred to home brew mct is that they are more 'pure'. I believe that the fact that they are originally manufactured to be a sterile pure solution, makes them more efficient than a product that has been made under much less stringent conditions, such as a oral use mct, which then you have to sterilise, etc. That or the sterilisation process of the oil when you make it yourself somehow affects the oil.
And it's not just in my head because most people that have used home brew and a proper SEO like Syntherol agree that not only that the results are way better, but they last longer and definetelly less pain.