Mercury hides behind lead and other metals, like aluminium, antimony. It messes up the body's normal detoxification pathways, so your body holds onto abnormal levels of other metals as well. This is called retention toxicity. The idea is to get rid of the mercury, and the other metals will come out. They come out in different orders - I think DMSA will pull lead before it pulls mercury for example. So you need to chelate for long enough to deal with all metals.

My latest hair analysis showed low mercury and high antimony, my son's showed low mercury and high aluminium. These are all signs of retention toxicity caused by high mercury which doesn't show up on the hair analysis.

Best
Nicola