There is a recycling mechanism of minerals functioning within the body. Yu can find plenty of articles on the net about this topic related to liver and bile. Or just simply ask a doctor! Unfortunately mercury is reabsorbed within the framework of the same mechanism. Many other metals are necessary for the body however, so we are lucky that thy get recycled regularly. A certain proportion of the Zn entering the intestinal tract coming out from the liver together with bile acid salts is probably caught by the Algin and taken out with the mercury together. Algin probably dos not differentiate too much between Hg an Zn, cause we know Algin absorbs Aluminium, Strontium, Cadmium and Lead as well. Zn on the other hand is very important for a high number of enzymes and hormones.