It is essential to life. The human body manufactures all the cholesterol it needs-thus we can live without eating any cholesterol. Cholesterol is attached to protein packages called lipoproteins, which are assembled in the liver and circulate in our bloodstream. High blood cholesterol is a known risk factor for heart attack. By consuming oils we effect our bloods cholesterol.
All vegetable oils are pure fat, and all are combinations of saturated and unsaturated fatty acids.
Fatty acids vary in their degree of saturation and in the length of their molecules. Saturated fats carry all the hydorgen atoms they can hold. Such fats come chiefly from animal sources, such as meat and whole milk. Saturated fats are usually solid at room temperature. Unsaturated fatty acids are missing some of their hydorgen atoms and are liquid at room temperature.