Fish oil is used to treat a range of conditions, particularly for afflictions involving the cardiovascular system. Fish oil is sometimes attributed to lowering blood pressure and cholesterol levels. It is also sometimes purported to help with treating depression, psychosis, attention deficit hyperactivity disorder and other mental or psychological concerns. Fish oil can be consumed as either a supplement or through eating more fish.
Omega-3 Fatty Acids
Fish oil is known for being high in omega-3 fatty acids, which are essential fatty acids. Omega-3 fatty acids are necessary for healthy brain function, development and growth. They may also reduce the risk for heart disease, cancer, inflammation and arthritis. According to the University of Maryland Medical Center, symptoms of low omega-3 fatty acid levels include poor memory, dry skin, heart problems, mood swings, depression and poor circulation.
Supplements
Fish oil is sold as a dietary supplement. It can be taken in either capsule or liquid form and is high in omega-3 fatty acids. Fish oil supplements are usually made from fatty fishes such as herring, mackerel, salmon, cod liver, halibut and tuna. Fish oil supplements are sometimes also derived from whale or seal blubber and may contain various other vitamins and minerals, such as vitamins A, B-1, B-2, B-3, C, D and E.
Shellfish
Shellfish such as crabmeat, clams, shrimp and lobster are all good sources of omega-3 fatty acids. Approximately 3 ounces of shellfish contains between 0.3 and 0.15 grams of omega-3 fatty acids. Shellfish contains less omega-3 fatty acids per serving than fish oil, but it also contains a variety of other nutrients that can provide other health benefits that a fish oil supplement may be lacking. For example, shellfish contains protein and helps boost general energy levels as a result of calorie consumption.
Fish
Fish is a natural source of omega-3 fatty acids, particularly fattier fish varieties. According to MedlinePlus, mackerel, tuna, salmon, sturgeon, mullet, bluefish, anchovy, sardines, trout and menhaden are all good sources of omega-3 fatty acids. Approximately every 3.5 ounces of fish contains 1 ounce of omega 3-fatty acids. The cooking method used on the fish will affect how much omega-3 fatty acids or fish oil is obtained. Broiled, baked, steamed or poached fish will preserve the benefits of fish oil. However, deep or pan fried fish often cancels out any of the benefits of fish oil, including omega-3 fatty acids.
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