It was found that people who took MCT oil before meals ate less at their next dinner.It has also been shown that MCT oil can help you think more clearly. One study found that MCT oil helped people with Alzheimer's disease think more clearly and use their brains better. In a different study, healthy people who took MCT oil had better memory and brain function. MCT oil may also help people with ADHD, anxiety, and sadness think and remember things better.