As a fish oil variant, cod liver is rich in omega-3 fatty acids, as well as eicosapentaneoic acid and docosahexanoic acid. The liver oil also has vitamin A and vitamin D, which are responsible for the promotion of visual and skin health, respectively. Just like fish oil, cod liver oil also has various benefits. A german study involving patients with rheumatoid arthritis found that intake one one gram of cod liver per day for three months resulted to pain reduction of their stiff joints. Another study found that the oil reduced pain and cartilage damage secondary to osteoarthritis , along with the decreased necessity for joint replacement.
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