&gt;&gt; and breast cancer rates are pretty steady across countries<p>No, they are not. See Japan. Eat your Kelp.
<a href="http:&#x2F;&#x2F;www.berkeley.edu&#x2F;news&#x2F;media&#x2F;releases&#x2F;2005&#x2F;02&#x2F;02_kelp.shtml" rel="nofollow">http:&#x2F;&#x2F;www.berkeley.edu&#x2F;news&#x2F;media&#x2F;releases&#x2F;2005&#x2F;02&#x2F;02_kelp....</a><p>I find that one interesting because they suggest not to eat a lot of kelp in part due to the high iodine content. But lots of others (self included) believe the iodine is the key.