yes ultimate efas parent essential oils liquid 4oz, based on the peskin protocol, organic plant based, omega 3 6, no fishy aftertaste ultimate efas because they really work! many of our customers refer to brian peskin's yes efa's as "liquid gold." unlike most commercial oil supplements, yes efa's are produced in small, limited quantities. the oils have no pesticides and have organic certification. since no fish oils are ever used, there is no "fishy" aftertaste or dangerous toxins. and you can rest assured that you receive "parent" oils, not the harmful overdoses of "derivatives," as found in so many commercial products. don't settle for less than the very best!