Final answer:
Regular milk contains polyunsaturated fatty acids, which are liquid at room temperature and have health benefits.
Step-by-step explanation:
Regular milk contains polyunsaturated fatty acids, which are liquid at room temperature.
Polyunsaturated fatty acids contain at least two fewer hydrogen atoms than the same-length saturated fatty acid chain. The C=C double bonds in polyunsaturated fatty acids create bends in the carbon chain, making it harder for the fatty acids to pack together tightly, resulting in a liquid state at room temperature.
Consuming a diet rich in mono- and polyunsaturated fats, like the ones found in regular milk, is associated with a lower LDL cholesterol level and a lower risk of heart disease.