Continue, review and test other chelation protocols
Chelation therapy is treatment process where an agent is given to scavenge the body for heavy metals such as mercury, lead, aluminum and arsenic. It is felt by many that one of the paths that leads a child towards the symptoms of autism is an exposure to toxins such as heavy metals at a critical point in his/her development. Some children may be genetically predisposed to a decreased ability to detoxify (such as those with MTHFR mutations), but any child will suffer neurological damage if exposed to high enough levels of heavy metals.
Retesting can uncover new exposures or redirect the needed protocols.