Our raw material are wild walnut, It choosed from the primeval forest in Changbai Mountain, over 2000 meters elevation. Using the most advanced pure physical cold pressing technique, go through 7 layers of hyperfine filtering procedure, a piece of walnut only output two drops walnut oil, that means we producing 100 percent pure wild walnut oil only. So it has pure color, completely nutrition, pure natural DHA + A, therefore our product can fulfill preganacy and babies nutritional requirement.