The monounsaturated and polyunsaturated fats.
A polyunsaturated fat has two or more double bonds in its carbon chain. There are two main types of polyunsaturated fats: omega-3 fatty acids and omega-6 fatty acids. The numbers refer to the distance between the beginning of the carbon chain and the first double bond. Both types offer health benefits. An unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain. A fatty acid chain is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond. Where double bonds are formed, hydrogen atoms are eliminated. In cellular metabolism, unsaturated fat molecules contain somewhat less energy (i.e., fewer calories) than an equivalent amount of saturated fat. The greater the degree of unsaturation in a fatty acid (i.e., the more double bonds in the fatty acid) the more vulnerable it is to lipid peroxidation (rancidity). The types of unsaturated fats are: the monounsaturated and polyunsaturated fats, which are found in nuts, fish, and vegetable and fruit oils. These fats are naturally unsaturated because they do not contain the maximum number of hydrogen atoms, and usually remain liquid at room temperature. A Intermountain Healthcare answered. Unsaturated fat is a type of fat that is liquid at room temperature and comes mostly from plant sources. Eating foods high in unsaturated fat -- especially in place of foods with a lot of saturated fat -- may help lower low density lipoprotein (LDL), or bad, cholesterol levels. There are two main types of unsaturated fat: monounsaturated and polyunsaturated. Monounsaturated fats occur mostly in plant oils. Good sources of monounsaturated fats include: Polyunsaturated fats are found in plant foods and some fish. A Intermountain Healthcare answered. Unsaturated fat is a type of fat that is liquid at room temperature and comes mostly from plant sources. Eating foods high in unsaturated fat -- especially in place of foods with a lot of saturated fat -- may help lower low density lipoprotein (LDL), or bad, cholesterol levels. 1 Unsaturated fats are found in plant foods, like avocados, nuts, olive oil, peanut oil, canola oil, corn oil, and safflower oil. 2  Fatty fish, such as salmon, herring, albacore tuna, trout, and mackerel, also have unsaturated fats. Unsaturated fats are the healthiest type of fat. 1  You want most of the fats you eat to be unsaturated (say: uhn-SACH-uh-ray-tid) fats. 2  Fats are nutrients that give you energy. Fats have 9 calories in each gram. Fats help in the absorption of fat-soluble vitamins A, D, E, and K. Fats are either saturated or unsaturated, and most foods with fat have both types. But usually there is more of one kind of fat than the other. Saturated fat is solid at room temperature, which is why it is also known as solid fat.. It is mostly in animal foods, such as milk, cheese, and meat Unsaturated fats. Unsaturated fats are the healthiest type of fat. 1  You want most of the fats you eat to be unsaturated (say: uhn-SACH-uh-ray-tid) fats. 2  Unsaturated fats are found in plant foods, like avocados, nuts, olive oil, peanut oil, canola oil, corn oil, and safflower oil. 1 One type of polyunsaturated fat is made up of mainly omega-3 fatty acids and may be especially beneficial to your heart. 2  Omega-3, found in some types of fatty fish, appears to decrease the risk of coronary artery disease. 3  It may also protect against irregular heartbeats and help lower blood pressure levels. There are numerous types of fat. Your body makes its own fat from taking in excess calories. Some fats are found in foods from plants and animals and are known as dietary fat. Dietary fat is a macronutrient that provides energy for your body. Thus, a saturated fat has no double bonds, has the maximum number of hydrogens bonded to the carbons, and therefore is saturated with hydrogen atoms. In cellular metabolism, unsaturated fat molecules contain somewhat less energy (i.e., fewer calories) than an equivalent amount of saturated fat. The greater the degree of unsaturation in a fatty acid (i.e., the more double bonds in the fatty acid) the more vulnerable it is to lipid peroxidation (rancidity).
http://www.health.harvard.edu/staying-healthy/the-truth-about-fats-bad-and-good https://en.wikipedia.org/wiki/Unsaturated_fat https://www.sharecare.com/health/fats-nutrients-diet/what-types-unsaturated-fats https://www.sharecare.com/health/fats-nutrients-diet/what-types-unsaturated-fats http://www.girlshealth.gov/nutrition/basics/fats.html http://www.webmd.com/diet/guide/types-of-fats-topic-overview http://www.girlshealth.gov/nutrition/basics/fats.html http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/fat/art-20045550 https://en.wikipedia.org/wiki/Unsaturated_fat
types of unsaturated fats