Purity is most important when choosing a fish oil. Fish oil is extremely susceptible to contamination from heavy metals such as mercury, and also from environmental chemicals such as fertilizers and pesticides. Eskimo-3 researchers had to develop a method of removing these harmful toxins from the oil. The extensive research and development behind Eskimo-3 has made it one of the purest, most stable, and therefore most effective fish oils on the market today.

A survey by the Food Safety Authority of Ireland in 2002 examined a range of popular fish oil capsules for the presence of dioxins. Of all the fish oils scientifically tested, Eskimo-3 was found to have the lowest levels of contaminants, which include dioxins and dioxin like PCBs. Also, the concentration of heavy metal contaminants such as cadmium and mercury were below detection levels in Eskimo-3.

Ongoing research in other countries has confirmed the leading position of Eskimo-3