Fermented cod liver oil is one of the most common sources of the beneficial omega-3 fatty acids like DHA and EPA, explains Medline Plus. It also contains rich stores of vitamins A and D, necessary for many aspects of health. Taking cod liver oil supplements or other types of fish oil might offer a number of benefits based on research, though not all purported uses have strong backing behind them. You should use caution with cod liver oil if you take blood-thinning medications or medications to suppress immune system reaction. Do not exceed dosages of 3 g daily without professional guidance.
Inflammation
The omega-3 fatty acids found in cod liver oil have been well established as anti-inflammatory agents. This makes cod liver oil a potentially useful treatment for conditions influenced by inflammation such as arthritis, skin conditions like eczema and inflammatory bowel diseases.
Heart Health
MedlinePlus explains that fish oil supplements like cod liver oil have shown strong promise in research for lowering triglycerides. A type of fat used for energy, triglycerides can increase your risk for heart disease when present in high amounts. The site notes that research has shown fish oil can lower triglycerides by 20 to 50 percent. MedlinePlus also rates fish oil supplements as "likely effective" for preventing heart disease and reducing the risk of fatal heart attacks.
Brain and Mental Health
The omega-3 fatty acids found in cod liver oil exist in high concentrations in the brain. The University of Maryland Medical Center notes that supplementing with fish oil might benefit the brain and overall mental health. It notes possible benefit for conditions like depression and ADHD, although studies have not shown a conclusive link. MedlinePlus also notes possible effectiveness for bipolar disorder and psychosis.
Chiropractic doctor Ben Kim writing for his website, DrBenKim.com, recommends pregnant women take cod liver oil to reduce the risk of depression during and after pregnancy. MedlinePlus notes that fish oil in the recommended dosages of 3 g or less daily appears to be safe for pregnant and nursing women. If pregnant, you should always clear the use of any natural supplement with your doctor.
Weight Loss
MedlinePlus notes research that has shown taking six grams of fish oil daily reduced body fat significantly when combined with exercise. This represents twice the recommended dose, so consult with your doctor.
Vitamins A and D
Cod liver oil's rich stores of vitamins A and D also offer benefits. Dr. Kim notes the necessity of vitamin A for proper vision, skin health and digestive health. Vitamin D helps promote healthy immune system function, bone and teeth health and healthy blood sugar levels.
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