Highly Refined Fish Oil Supports Healthy Development of the Brain, Eyes & Nervous System Dietary Supplement Neuro-DHA is a highly refined oil that has undergone an advanced extraction process which concentrates the DHA to a higher lipid fraction concentration than EPA without the use of chemical solvents. A higher DHA to EPA ratio is similar to that found in human tissue and is critical to the development and health of the brain, eyes and nervous system. This same process also maintains important tri-, di and mono-glycerides which offer superior absorption over common, commercially processed (methyl & ethyl ester form) fish oils. Source from Norwegian Coldwater Fish Laboratory Tested Free of Heavy Metals & Contaminants DHA is essential for childhood neural development and senior cognitive maintenance.