The “other omega-3s” listed on Nordic Naturals labels refer to omega-3 fatty acids (other than EPA and DHA) that naturally exist in fish oil in low levels. These “other omega-3s” include fatty acids such as DPA (docosapentaenoic acid) and ETA (eicosatetraenoic acid). These fats are involved in essential fatty acid metabolic pathways in the body. EPA and DHA are the best-studied omega-3 fats and are considered the most functional omega-3s. You will find this information on the label because Nordic Naturals tests each product to know exactly what is in the oil, and is committed to disclosing complete information to our customers.