IPA: /oʊˈlɛstrə/
KK: /oʊˈlɛstrə/
A fat substitute that has no calories and is made from sugar and vegetable oil, used in snacks like chips, which the body does not digest.
Many snack foods use olestra as a fat substitute to reduce calories.
Olestra is a coined term derived from the combination of 'oleo-' (from Latin 'oleum', meaning oil) and 'estra' (a suffix suggesting a chemical compound). The word refers to a synthetic fat substitute that mimics the properties of fat without the calories, thus combining the essence of oil with a chemical structure.
Think of 'oleo' meaning oil, which helps you remember that olestra is related to a fat substitute that acts like oil but has fewer calories.