Trans fats are best described as which of the following?

• A. Trans fats are a type of unsaturated fat formed during partial hydrogenation
• B. Trans fats are a type of saturated fat
• C. Trans fats are a carbohydrate
• D. Trans fats are a protein

Answer: (D)

Trans fats are unsaturated fatty acids that have trans double bonds. They’re usually formed when vegetable oils are partially hydrogenated to improve texture and shelf life, converting some cis bonds to trans. This gives them stability like saturated fats but they remain unsaturated due to the double bonds, and they can raise LDL cholesterol while lowering HDL, increasing cardiovascular risk. They are not carbohydrates or proteins, and they are not purely saturated fats, though their health impact mirrors saturated fats because of their effect on cholesterol. Some natural trans fats occur in small amounts in dairy and meat, but they’re still fatty acids with trans configurations rather than carbohydrates or proteins.