There are many types of lipids, or also known as fats. Fat gives the food you eat, aroma, texture and mouthfeel. Fat is not always bad as most think it is. It helps you metabolize certain nutrients, and also it helps you process vitamins. Another thing that fat does, it it pads your organs. Fat contains 9 kcal/gram, it is energy rich. There are three major types of fats. Triglycerides is 95% of your body fat. When you get a blood test, the doctor measures this. You want to be below 100, but being over 150 it is dangerous. Phospholipids let fat and water mix. With sterols, you want to not have a lot of LDL, but you must have more HDL. Saturated fats are solid, and they elevate LDL and cholesterol. Polyunsaturated fat are fish and nuts, these are good for you if you eat a good amount. Monounsaturated is liquid at room temperature like olive oil. Another thing called hydrogenation (trans fats) is a common thing added to food. Its helps increase the shelf life. By adding hydrogen it increases the LDL. There is a lot in Ramen, frozen goods, and candy. Some fat can be good if you eat it reasonably, but other fats, if eaten too often, can cause your body to be unhealthy.