Fish oil comes from the tissues of very oily fish, and it's one of the most important things you can eat as part of a healthy diet. Omega-3 fatty acids are the most important thing you get from fish oil, and they help your body reduce inflammation. It's a good idea to take fish oil supplements or take a multivitamin that includes omega-3s. Fish oil can also be absorbed by eating certain kinds of fish.
Omega-3 fatty acids aren't actually produced by fish. Instead, fish oil is actually created by fish after they eat the microalgae that produce omega-3s. Some predatory fish also accumulate omega-3s from eating fish that eat the microalgae. These include trout, flounder, mackerel, salmon and albacore tuna. However, it should also be noted that these same fish also accumulate some toxic substances from eating other fish. Because of this, it's recommended that you don't eat a large number of these fish. Also, eating a lot of fish liver isn't healthy because of the large amounts of active vitamin A. Large amounts of this can be hazardous to your health.
While fish oil capsules make for a nice supplement to your regular diet, you do need to check the bottle before taking them. Make sure that any fish oil you take has been reviewed and approved by the International Fish Oil Standards program, which ensures that fish oils do not contain any contaminants and are actually healthy for you.
According to most experts, fish oil can help regulate your cholesterol. It also has anti-inflammatory uses and can help your body composition. Some studies also seem to show that fish oil can actually help depression, but not enough research has been done to verify this.
When it comes to taking fish oil, one gram a day is the American Heart Association's recommendation. It's best if you get this from eating fish, though that's not always possible. In that case, a good multivitamin with fish oil is recommended.