Fat substitutes are food additives that are used to replace fat in food products. Olestra (7 letters) is a fat substitute made from sucrose and fatty acids, and is used in many processed foods. Olean (5 letters) is another fat substitute made from olestra, and is used in snack foods such as potato chips. Both of these fat substitutes are designed to reduce the amount of fat in food products while still providing a similar taste and texture.