Lipoproteins transport cholesterol and other fats in the blood stream. Because cholesterol is like a fat it will not mix with water. Therefore, in order for blood cholesterol and fats to be able to travel through the blood stream, the body has to combine them with protein. The two major kinds of lipoproteins are LDLs and HDLs. Most fats are more technically referred to as triglycerides.
Triglycerides are the most common form of fat stored in the body and circulating in the blood.
It is the form fat takes from the food we eat. Fat in table meat is composed of triglycerides. A level between 200-400 is high. Yes, both cholesterol and fats are needed. Cholesterol is necessary for the body to make Vitamin D and certain hormones.