"Giusi" > wrote in message
> Do fresh water fish have iodine? I would have thought trout, etc. would
> be safe...
>
Iodide is an important food often given to trout in hatcheries. While low
in iodine compared to other fish, it does contain some. Trout have been used
in thyroid research too.

http://www.iodine4health.com/researc...food_table.htm
The iodine content of fish is quite variable. In general, marine fish have
more iodine than fresh water fish, and a significant part of the iodine is
in the head of the fish (where the thyroid is). Here are some typical
amounts for some common fish, in mcg/100g: Cod (110), Haddock (250), Herring
(29), Mackerel (140), Sardines (29), Tuna (30), Atlantic Salmon (76),
Rainbow Trout (13). Here are a few ranges to give you a sense of the
variability of iodine in fish (mg/100g): Haddock (60 – 920), Pollack (23 –
266), Cod (18 – 1270).