Seaweeds can be contaminated with heavy metals because of bioaccumulation. The heavy metal contents in most edible
seaweeds are generally below the maximum concentrations permitted in most countries [1,3,6] . Heavy metals could be a
safety risk for seaweed consumption, but most countries regularly monitor the heavy metal contents in seaweed and seafood products. In this respect, the food safety risk of sea-weeds in relation to dangerously high heavy metal levels is low.