MCT oil, or medium chain triglyceride oil has become hugely popular recently. Many people spoon some into their coffee every morning to help sharpen the brain or increase energy. But people also often use medium chain triglycerides (also known as medium chain fatty acids) as part of a weight loss diet. Exactly how to use MCT oil for weight loss is a widely debated topic. In this article, we’ll investigate the evidence around MCT oil, how to use it, and its weight loss effectiveness.