Patients with Type 2 diabetes are likely to benefit from taking cod liver oil, which seems to reduce the level of protein found in the urine, according to WebMD. Lower protein levels in the urine indicate a less severe case of kidney disease, according to WebMD.
Cod liver oil is found in supplements or naturally in cod liver, explains WebMD. Taking cod liver oil increases fatty acids, which reduces pain and swelling. Taken as a treatment for several conditions, such as high triglycerides, high blood pressure and diabetes associated with kidney disease, it is possibly an effective treatment. However, taking cod liver oil does not seem to help those with arthritis or with high cholesterol.
Those with high triglycerides can have a 20 to 50 percent reduction in the levels, when taking cod liver oil by mouth, states WebMD. There is insufficient medical evidence supporting claims that taking cod liver oil is an effective treatment for other conditions, such as wound healing, heart conditions, ear infection in children or depression.
Cod liver oil treatment is likely safe for most people, but taking it with a meal helps decrease side effects, such as belching, heartburn, nose bleeds or bad breath, notes WebMD. It is important to use only the amount necessary to alleviate symptoms, avoiding possibly unsafe side effects of taking too much cod liver oil, such as increase in vitamins A and D, higher chance of bleeding, inability of blood to clot, nausea and loose stools.