Fish liver oil comes from the liver of fish. It supplies natural vitamin A, vitamin D, and omega-3 fatty acids like EPA and DHA. Compared to standard fish oil, this supplement delivers far more vitamins A and D.
People take it to get vitamins A and D. Vitamin D helps the body use calcium. Vitamin A supports skin and the moist surfaces that line the nose, mouth, and gut. These vitamins also support daily immune function.
Softgel pills are the usual form. Take them with a meal because fat improves absorption of these vitamins. Doses vary widely between brands, so follow the label exactly.
Too much vitamin A over time can build up in the body. That buildup may harm the liver, weaken bones, or cause birth defects. Pregnant or nursing women need to be especially careful. Anyone using blood thinners should check with a doctor before starting.