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Purity & Quality

Purity, quality, and adherence to International standards make these products standout in the marketplace. From 3rd Party testing to clinical trials, the reputation of these products has produced dozens of awards and accolades ever since their introduction. Click a tab below to learn more about the outstanding purity and quality of our product lineup.

Standards Comparision Chart

Anyone can say that they produce superior omega-3 fish oil. Not everyone can prove it. The only objective proof of fish oil purity is third-party analysis that verifies adherence to strict standards. Many leading organizations and experts have set purity standards for natural products. Nordic Naturals meets every one. Click here to view the chart (.pdf format) for proof.

Standards are Set to Protect Consumers

Governmental fish oil quality standards do not exist in the United States. To ensure consistent quality, Nordic Naturals adheres to and exceeds the stringent European Pharmacopoeia Standard (EPS) as well as the voluntary standards set by the Council for Responsible Nutrition (CRN) and the Global Organization for EPA and DHA Omega-3 (GOED) for all of their oils. These standards guarantee quality products by setting maximum allowances on peroxides, heavy metals, dioxins, and PCBs.

Measurement EPS CRN US
Freshness-  peroxide value 10 5.0 N/A
Heavy Metals-  parts per million (ppm) 0.1 0.1 N/A
Dioxins - parts per trillion (ppt) 2.0 2.0 N/A
Dioxin-like PCBs-  parts per trillion (ppt) N/A 2.0 N/A
Total PCBs-  parts per million (ppm) N/A 0.09 N/A

Heavy Metals

All oils used in Nordic Naturals products showed no detectable heavy metals when tested down to the Global Organization for EPA and DHA Omega-3 (GOED) and Council for Responsible Nutrition (CRN) standard of 0.1ppm

Product Mercury Lead
Omega-3 <0.01 ppm <0.01 ppm
Complete Omega-3.6.9 <0.01 ppm <0.01 ppm
Ultimate Omega <0.01 ppm <0.01 ppm
EPA <0.01 ppm <0.01 ppm
Arctic Cod Liver Oil <0.01 ppm <0.01 ppm


All oils used in Nordic Naturals products show no detectable dioxins or furans when tested down to 2.0 ppt. Analysis is based on the toxicity equivalent testing methodology established by the World Health Organization (WHO).


All oils used in Nordic Naturals products show no detectable dioxin-like PCBs when tested down to 1.0 ppt. The Global Organization for EPA and DHA Omega-3 (GOED) limit for dioxin-like PCBs is 3.0 ppt. Analysis is based on the toxicity equivalent testing methodology established by the World Health Organization (WHO).

Product Dioxins Dixon-like PCBs Total PCBs
Omega-3 <1.0 ppt <1.0 ppt <0.09 PPM
Complete Omega-3.6.9 <1.0 ppt <1.0 ppt <0.09 PPM
Ultimate Omega <1.0 ppt <1.0 ppt <0.09 PPM
EPA <1.0 ppt <1.0 ppt <0.09 PPM
Arctic Cod Liver Oil <1.0 ppt <1.0 ppt <0.09 PPM

Protection from Fishy Smells, Taste, and Harmful Free Radicals

Freshness, which ensures product integrity and biological efficacy, may be the single most important quality of fish oils. Nordic Naturals' patented, oxygen-free manufacturing process maintains the freshness of fish oil used in their products, with peroxide values (indicators of freshness) well below the European Pharmacopoeia Standard limits. The lower the peroxide value, the fresher the fish oil.

Award Winning Purity Levels

Protection from Harmful environmental Toxins

Every batch of oil used in Nordic Naturals' products is third-party tested for environmental toxins including heavy metals, dioxins, and PCBs, ensuring that every product exceeds international pharmaceutical standards and is at least 750 times purer than fish. Nordic Naturals was ranked #1 out of the top 10 fish oil brands in Norway for freshness, purity, and highest concentration.

Great Taste

Unsurpassed Freshness Equals Great-Tasting Fish Oil

The key objections to taking fish oils are taste and aftertaste. Nordic Naturals utilizes proprietary enzymatic and oxygen-free processing technologies to ensure no fishy smell, taste, or aftertaste. The patented encapsulation process also adds natural fruit essences into both the soft gel and liquid oil for a light, fruity taste. Years of feedback from health professionals and customers alike indicates that children, teenagers, and adults of all ages enjoy the clean, light taste of Nordic Naturals fish oils.

Exclusive and Exceptional Raw Material

Selectively Sourced from Sustainable Seas

Nordic Naturals starts with the best raw material available. Nordic Naturals meticulous quality control procedures begin in the ocean with their careful choice of fish specie that are naturally low in toxins and high in omega-3 fats. Wild-caught from some of the cleanest waters in the world, all of their products are made exclusively from four types of fish, all sustainably sourced, and none of which is endangered: Arctic cod (Skrei) from Norwegian waters; anchovies and sardines from the Southern Pacific Ocean; and salmon (Pink and Sockeye) from Alaska's Cook Inlet.

Multi-Patented Manufacturing Process

Without Excessive Heat or Chemicals

Nordic Naturals' multi-patented manufacturing processes enable them to deliver industry-leading freshness and purity levels. Nordic Naturals uses everal steps in processing their oils, from water and clay filters to molecular distillation, with no chemicals or excessive heat, all while preserving the natural constituents of the oil to the highest degree possible. A patented purification process removes any potential environmental toxins (heavy metals, dioxins, PCBs, etc.), saturated fats, and other undesirable organic compounds, leaving only the beneficial components of the fish oil (omegas 3, 5, 6, 7, 9, 11, etc.). Nordic Naturals also utilizes a proprietary nitrogen (oxygen-free) environment to achieve their leading freshness levels, and to further reduce heat requirements, thereby maintaining the integrity of the oils. Moreover, Nordic Naturals uses only natural enzymes to form triglycerides for all their high-concentrate products, and all their oils are manufactured in triglyceride form in order to best preserve the oil and enhance absorption and utilization.

True Triglyceride vs. Ethyl Ester Form of Fish Oil

Ensuring Optimal Absorption

The established health benefits of omega-3s are based on decades of data—much of which are based on natural triglyceride omega-3s. Whereas most concentrated fish oils on the market today are in the ethyl ester molecular form—a synthetic fat with only 18 years of history in the human diet—all Nordic Naturals formulas are produced in true triglyceride form to ensure optimal absorption and results. New research shows that the absorption advantage of the triglyceride form is significant—up to 70% more than ethyl esters.

Dyerberg J, et al. Bioavailability of marine n-3 fatty acid formulations. Prostaglandins Leukot Essent Fatty Acids 2010 Sep; 83(3):137–141.

Research-Based Innovation

Driven by the Latest Science

Nordic Naturals is a research-driven company, where processing technology and product formulations are driven by the latest scientific developments. Nordic Naturals dedication to innovation is grounded in scientific research guaranteed by active participation in peer-reviewed clinical studies recognized by leading experts worldwide. With a reputation for efficacy and potency, Nordic Naturals fish oils are regularly chosen by independent research institutions and universities—such as Harvard University, Columbia University, The National Institutes of Health (NIH), Stanford University, Duke University, UCLA, and the Cedars-Sinai Medical Center—with 20 published studies and more than 40 in progress.

Corporate Social Responsibility

Embracing the Communties and Their Customers

Corporate Social Responsibility (CSR) is a movement that encourages companies to embrace responsibility for the impact their activities have on customers, employees, communities and the environment. At Nordic Naturals, CSR is guided by their mission and their core values that encourage community growth and development and voluntarily eliminate harmful practices—beginning with the sustainable sourcing of their raw materials and continuing through manufacturing, employment practices, philanthropic interactions, and donation programs. To Nordic Naturals, CSR means taking steps to proactively improve the quality of life for their employees and their families, their customers, and to preserve the health of the environment and society at large.

Vitamin E and Rosemary Extract Enhance the Long-Term Freshness of their Oils

Nordic Naturals has spent many years researching the impact of various natural stabilizers on fish oil. Nordic Naturals oils' exceptional freshness ensures products with no fishy smell or taste, improved compliance, and great results.

Sustainable Sourcing

Since Nordic Naturals founding, Nordic Naturals has always been deeply committed to the health of our oceans. Their environmental stewardship includes:

Regulated Fishing - To prevent overfishing, 100% of their fish is sourced in compliance with the Norwegian fisheries management system, which has been a model of sustainability for over 30 years.

Bycatch Prevention - Nordic Naturals uses responsible fishing gear—including purse seine nets, sorting grids, and large meshes—to protect against bycatch of unintended species.

Habitat Protection - Nordic Naturals uses line and net fishing methods to prevent the seafloor and ecosystem damage caused by methods such as bottom trawling and dredging.

Marine Pollution Prevention - Up to 80% of marine pollution is caused by land-based sources such as runoff, sewage, and waste. Nordic Naturals coastal processing facilities are industry leaders in minimizing pollution and conserving resources.

Nordic Naturals uses only Wild-Caught, Sustainably Sourced Fish:

Arctic Cod (Skrei) - Sourced from the Norwegian Sea. Fishing regulations include quotas, minimum catch and net mesh sizes, fishing ground closures, and net and line fishing methods.

Pacific Sardines & Peruvian Anchovies - Sourced from the South Pacific Ocean, off the coast of Peru. A 2008 research report ranked the sustainability of the Peruvian fishery as the best in the world.

Alaskan Pink & Sockeye Salmon - Sourced exclusively from Alaska's Cook Inlet. 100% of salmon is used for human or animal consumption.