The best coconut oil for constipation is one that satisfies your needs. What do I mean? If you need a type of coconut oil that can make you poop and provide good health benefits at the same time, I'd say the best coconut oil for the job is virgin coconut oil.
But if your definition for "best" is you desperately need a more potent type of coconut oil to ease constipation, use MCT oil.
MCT oil is a type of fractionated coconut oil. It composes solely of MCTs (medium-chain triglycerides). Virgin coconut oil carries about 50 – 64% of MCTs.
What makes coconut oil a good natural laxative? Its MCTs. Hence, MCT oil works faster and stronger since it contains the most amount of MCTs.
However, I still prefer virgin coconut oil as the best for easing constipation. Like I said early on, virgin coconut oil provides other health benefits besides stimulating bowel movement.
Alternatively, if you want everything from virgin coconut oil but without its naturally-occurring odor, use the refined RBD coconut oil.