Cod Liver Oil: Nordic Naturals Tops List for Potency and Taste

Nordic Naturals Arctic Cod Liver Oil has been named the best cod liver oil supplement for its high potency, purity, and orange flavor. The review distinguishes this product from other options by noting that a single teaspoon contains more than 1,000 milligrams of omega-3 fatty acids. The supplement is made from wild-caught, sustainably sourced cod and does not leave a fishy aftertaste, a common complaint about other liquid formulations.

The publication evaluated cod liver oil based on nutritional content, form, taste, and sustainability. Cod liver oil is high in vitamin D, vitamin A, and omega-3, nutrients that are often lacking in modern Western diets. Omega-3 is linked to improved eye and brain health, lower blood pressure, and reduced risk of cardiovascular disease. Vitamin A supports eyesight, immune function, and bone health, while vitamin D helps regulate calcium and phosphorus absorption for strong bones and teeth.

Consumers can choose between liquid and capsule forms of the supplement. Liquids generally provide more omega-3 and vitamins per serving but often have a fishy taste that requires mixing into strongly flavored beverages. They also require refrigeration after opening. Capsules are more convenient for storage and less likely to cause fishy burps, but they typically contain lower nutrient concentrations per serving. Prices vary, with capsules ranging from 20 cents to $1 per serving and liquids costing 30 to 60 cents per serving.

The review also highlighted a top value option in the form of kosher-certified capsules. These products are packaged in the United States and tested for harmful levels of mercury, dioxins, and other contaminants. They are free of wheat, gluten, soy, and other common allergens, though the large soft gels may be difficult for some people to swallow. Another option worth noting is a lemon-flavored liquid that holds an International Fish Oil Standards certification for purity and uses a nitrogen flush to maintain freshness, though it contains some synthetic vitamins.

Sustainability is a key factor for many buyers, with certified products from the Marine Stewardship Council or similar organizations recommended despite slightly higher prices. Some manufacturers sell fermented cod liver oil, claiming it retains more nutrients than standard distillation methods, while others argue the process damages omega-3 fatty acids and accelerates rancidity. The review notes that more concrete studies are needed to determine which claim is correct.

Side effects for most people are limited to gastrointestinal symptoms such as nausea, loose stool, and indigestion. The supplement can act as a blood thinner, so individuals taking prescription blood thinners or managing high blood pressure should consult a doctor. It is not recommended for pregnant women and may interact with certain contraceptive medicines and weight-loss drugs containing orlistat.