Many people are justifiably concerned about mercury levels and other environmental toxins in fish, especially larger species. Nordic Naturals fish oils provide you with all the benefits of the omega-3s EPA and DHA, without the risk of toxins found in fish. The fish oil used in every batch of our products is tested by independent laboratories and consistently delivers exceptional results, surpassing the strictest international standards for fish oil purity, freshness, and potency. Certificates of Analysis are available on our website; simply enter your lot number to view the certificate for your specific bottle.