MCT (medium-chain triglycerides) is translated as medium-chain triglycerides. It is a type of fat, in large quantities contained in coconut oil. In smaller amounts in the milk of mammals. Lauren describes Brain Octane Oil in her article here on Lean Optimum.
Triglycerides are the most commonly occurring form of fat. In triglycerides, three fatty acids are combined into one glycerol molecule. And in MST triglycerides, these fatty acids are mid-chain. They are not short, not long, but medium. Well, that’s actually it.