I recently noticed that Trader Joe's no longer
has pine nuts. I was buying them there because
they were much cheaper than Whole Foods.

Today I heard on National Public Radio about
a taste disorder termed "pine mouth", which
is an adverse reaction to eating pine nuts.
It was speculated this was caused either by
rancid pine nuts or Chinese pine nuts from
two species of trees not known to produce
edible pine nuts. I don't know if the
disappearance of pine nuts from Trader Joe's
is related to this.

Apparently, this phenomenon has been known
for some time.

http://www.dailymail.co.uk/health/article-1184261

On a related note, the Korean cooking show
Cooking Time recently recommended washing pine
nuts, saying the fat in pine nuts absorbs dust
from the air. I no longer try to make sense
of anything they say. Watching that show is
like watching the religious broadcasts of the
late Dr. Gene Scott. I watch it because it's
so wacky.