The Eades have changed their minds on flax since writing Protein Power.
See <http://home.earthlink.net/~zoral/new.html>.

"Since we wrote the section on eicosanoids, we have had brain transplants.
(Unfortunately when Mike wrote that section he had fallen under the evil
influence of our good friend, Barry Sears.) We, too, now believe that flax
seed oil can be valuable and we take it ourselves and use it on many of our
patients. However, in some people (those who are very ill, the elderly,
diabetics, and certain others) the enzyme that converts LA to GLA may
function poorly, in which case, the inhibitory effect of flax oil on
delta-6-desaturase may be enough to cause problems. "