If arsenic is found to be in high levels in kelp JK ,then wouldnt chlorella , spirulina and other microscopic sealife also have high levels ?I thought that heavy metal concentrations increased with the size of the marine organism which is why large fish have more than small ones such as shrimp . Maybe the best way to increase iodine intake is by using iodized salt instead of seasalt.Where does the iodine in lugols come from?