Medium-chain triglycerides are triglycerides with two or three fatty acids having an aliphatic tail of 6–12 carbon atoms, i.e., medium-chain fatty acids (MCFAs). Common food sources for the extraction of MCTs include coconut oil and palm kernel oil. Although MCT is safe to consume as a food, it is not always safe to consume through inhalation. One reason for this is that MCT has a very low smoking point. When any oil turns to smoke, there is the possibility for converstion of compounds and combustion, causing the release of toxins. Another reason is that MCT is a fatty acid oil which can build up in the tiny pockets of the lungs causing lipid pnemonia. Though most CBD vape cartridges containing MCT do not contain enough of the fatty acids to cause such illness, it is worth noting that the possibility is concerning. Not all vape products marketed as ‘pure CBD’ vape oil is MCT-free, in fact, it’s used in many sold today . When you’re checking through the list of ingredients, choosing to avoid CBD vape pens containing MCT is in your best interest.