The problem with heavy metals for me is not the specific heavy metal or the source it may have come from, but the fact that the body is storing it. Some people have a problem and their body has a tendency to store heavy metals. There is not enough research, in my opinion, on this problem which has to do with these proteins referred to as MT for short (metallotheonein). This protein does not function properly in some and does not facilitate the excrection of all heavy metals from the body. William Walsh of the Pfeiffer Institute is the main person doing research in this area. There is no test for this yet, but Walsh recommends having blood levels of zinc, copper and ceruloplasmin checked. It seems that taking a certain dose of zinc is supposed to trigger this protein to start doing its job of excreting these metals. So, a zinc deficiency can cause people to store all heavy metals that they come in contact with.
There are mothers on other forums who talk about the mercury their kids are storing in their bodies, and these are usually male children. It seems that testosterone can suppress this protein somehow.
I happen to think we can be exposed to heavy metals from many different sources making it hard to know what metals we are getting from various aspects of our environment. I have read that some plants may take up some metals if the soil is deficient in some needed minerals. This site says that fish may be contaminated with arsenic.
http://www.nzfsa.gov...senic/index.htmIt is like the cold. We come in contact with germs all the time, but if your immune system is weak you will get a cold. And NOT because you sat next to someone who had a cold and sneezed in your direction. Our environment is laced with toxins and sometimes our bodies don't handle those toxins as well as we think they should. Everyone can be exposed to these metals but only some people seem to build up levels in the body that are not healthful. The solution, I think, is look at the body's ability to deal with these toxins and metals we are exposed to all the time. Poor nutrition can make people vulnerable to not dealing with these toxins appropriately.