Pseudo fat is a term used to describe a type of fat substitute known as Olestra, which is a seven-letter word. Olestra is a synthetic fat molecule that is made up of sucrose and fatty acids. It has been used in the food industry since the late 1990s as a way to reduce the amount of fat in food products. Olestra is not absorbed by the body, so it passes through the digestive system without being digested, thus reducing the amount of calories consumed.