Fish oil and fish oil supplements contain the Omega 3 fatty acids DHA and EPA that are imperative to cell functioning. When our bodies are deprived of the omega 3s they need, it stunts our bodies ability to functioning properly causing bodily weakening. We all require omega 3s to sustain our minds and bodies keeping them healthy and running efficiently and therefore getting your daily fish oil recommended dosage is imperative to your well-being.
Our bodies lack the abilities to produce these particular fatty acids that need to be included in our diet. Since our western diets often don't supply us with the sufficient amount of omega 3-rich foods such as, salmon, flax seeds, walnuts or kale, resulting in people turning to fish oil supplements as their main source of omega 3s. Fresh foods, primarily fish, are an excellent source of omega 3, but one must be wary not to partake in too much fresh fish because of the toxins (high quality supplements solve the toxin problem because they are purified to remove contaminants). To get a 1-gram daily dose of omega 3 fatty acids, you have to consume about, four to seven servings of cod, or one to two servings of salmon. Now, that's a lot of fish along with a generous helping of contaminants on the side.
On a side note: our western diets are now superfluous with omega 6s, omega 3's ally, both are important to a healthy lifestyle, and our bodies need the right balance of the two for proper bodily functioning . Basically if you eat a typical western diet (which we all unwillingly do) which is filled with processed foods, you probably need to take fish oil just to get in balance with your Omega 3 and Omega 6.