The problems of too much fat in the body[IMAGE][IMAGE]Fats are compounds called triglycerides, formed by a condensation reaction between glycerol and usually 3 fatty acids (the bond is called foreign link). The molecule is quite large and has long hydrocarbon tails. If each carbon atom is joined by a single CC bond then we say it is SATURATED, if there is a double C=C carbon bond then we say it is unsaturated.[IMAGE]A chain with many C=C bonds is polyunsaturated. Most animal fats are saturated fats while most vegetable fats are unsaturated. Polyunsaturated fats found in vegetable oils are considered good fats. Saturated fats, the ones most abundant in animal products like meat and milk, are considered bad. Fats are essential as an energy reserve, for insulation and for the production of membranes, buoyancy, hormone production, but too much fat can have serious effects. One of the biggest problems is certainly heart disease and heart attacks, two of the main causes of death in the UK. Heart attacks are often common among obese people who have eaten too much fat without regular exercise, that is, overweight or obese. When you eat more fat-containing products and don't exercise, fat builds up in your arteries, which can cause high blood pressure. Fat builds up in and around the arteries and so the space inside the arteries becomes smaller, blood has to be pushed through a smaller space and the heart has to work harder and blood pressure increases. Fats that build up in the arteries can also cause heart attacks. Fat blocks important arteries such as the coronary arteries and the heart, and becomes covered in a layer of fat. When coronary arteries become blocked by fat, the consequences are very serious. The coronary arteries supply the heart with all the nutrients and fresh oxygen it needs to function properly. As the coronary arteries become increasingly blocked by sticky fatty deposits, less oxygen enters the heart, the heart suddenly stops, and the patient suffers from heart disease.