It is sobering to realize that the CNS acts like a drainage sink for these metals. Our fragile CNS is usually protected from invasion from outside offenders by an efficient, effective barricade known as the blood-brain barrier. Unfortunately, this barrier does not protect us from substances which were intended to be left deep within the depths of the earth in an ore called cinnabar. Mercury and lead, when inhaled or ingested into our bodies, are absorbed into the blood stream and easily cross over the blood-brain barrier to be distributed throughout precious neurological tissue. Mercury is a Universal Poison .
Mercury toxicity can cause nearly every disorder known to man.
Infants born to women who had ingested flour made from grain treated with a mercury-based fungicide had brain damage manifested by mental retardation, deafness, blindness, and cerebral palsy. Mercury ingestion leads to delayed CNS symptoms which may not manifest until months after the initial exposure. There may also be CNS signs and symptoms including psychological changes, insomnia, loss of appetite, excessive shyness, emotional instability, irritability, depression , headache, and short-term memory loss. Tremor is characteristic of exposure. Tics of various sorts and limb weakness can also be mercury related.