Some of us have read about the theories that EFAs are not essential and this is posted on people's blogs to. The work that keeps being cited by G & M Burr, keeps being accused of being a flawed study that possibly didn't account for certain B vitamin deficiencies (namely B5 and B6)... After reading their actual study it seems there is a flaw in the theory that the study is flawed. After reading the actual study it clearly says the groups of rats were fed diets containing yeast. Yeast contains vitamins B1, B2, B3, B5 & B6. A deficiency in those vitamins results in the symptoms of an EFA deficiency. So the rats can't have been deficient in those vitamins seems as they were fed yeast...