First, welcome, Sandra, another addition to the resources of Lactnet.
I suspected that decrease in fat content in one's body did not mean a
decrease in toxin content, for just the reason you describe.  I was going to
post on this because the Norwegian wire service had a story on Friday about
it.  The following is my translation.  The P.H.I. is a publicly funded
national institution.
It would seem that we ought to be concerned about the parts of our diet we
CAN do something about, and choose post-weaning foods with an eye to
reducing overall childhood exposure to environmental toxins, since the
babies need mothers' milk.

(headline) "Public Health Institute will survey toxins in mothers' milk
The P.H.I. will examine mothers' milk from Norwegian women to find out how
much exposure Norwegians are getting to toxins such as dioxins and PCB.
The level of dioxins and PCB in the environment has decreased in recent
years, and that is reflected in a decrease in these substances in mothers'
milk.  From 1986 to 1993 the concentration of dioxins in mothers' milk sank
by about 40 per cent, P.H.I.'s investigation shows.
The new survey, which was begun in the fall of 2000, will examine whether
there is a further decrease of these environmental toxins in mothers' milk.
There are two reasons the P.H.I. wants to test mothers' milk.  First, it
will give an indication of how much toxins breastfed babies get.  Secondly,
it can say something about the developments in the environment around us.
Environmental toxins such as dioxins and PCB are quite widespread in the
environment, and they are concentrated in the food chains.  Humans ingest
them from eating meat and fish.  Dioxins and PCP are stored in the body's
fat tissue and are secreted in mothers' milk.
The P.H.I. emphasizes that even though there are small amounts of
environmental toxins in mothers' milk, breastfeeding is still strongly
recommended.  Breastfeeding gives many positive health benefits."

Still nothing specific about codfish AFAIK!
Rachel Myr
Kristiansand, Norway

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