It could chelate and remove the mercury from the human body. Research appears to show that spirulina a blue green algae can also remove heavy metal toxins from the body. In terms of stimulating the immune system, nothing stimulates the immune system like the phycocanyn in spirulina. It causes more white blood cells to be made, results in a physical increase in the size of the Thymus gland where T cells are made, it swithches on the macrophages to excrete interferon and interleukin. One thing that oxygen therapy can do is to remove sticky blood.
Sticky blood occurs when the red blood cells begin to group together in clusters.
This greatly reduces the available surface area of the red cells for gasious exchange and hence reduces the effectiveness of oxygen carrying. I have seen photos of sticky blood before and after Ozone exposure and the cells immediatly dispersed to individual single cells immediatly after exposur to O3. When sticky blood develops the whole of the blood functions become impaired.