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.
In fact, cholesterol must be present in all cell membranes of the body in order for the body to function normally. Fats contain Vitamin A, D, E, and K. Fats keep our skin soft, insulate our bodies against the cold and cushion our internal organs. Fats are a source of concentrated energy because they contain so many more calories per gram than either protein or carbohydrates. This excess cholesterol tends to build up on the walls of the arteries, like rust in water pipes. As a result the passageway through these arteries progressively narrows.