Final answer:
Unsaturated fats are thought to lower LDL cholesterol levels and reduce the risk of heart disease when consumed as part of a diet rich in mono- and polyunsaturated fats.
Step-by-step explanation:
Unsaturated fats are thought to lower low-density lipoprotein (LDL) cholesterol, especially when combined with lower intake of saturated fat and trans fat.
Fat sources rich in unsaturated fatty acids tend to be liquid at room temperature, because the C=C double bonds create bends in the carbon chain, making it harder for fatty acids to pack together tightly.
Consuming a diet rich in mono- and polyunsaturated fats is associated with a lower LDL cholesterol level and a lower risk of heart disease.