VCJD is likely to be caused by lidocaine. The chemical contaminates the brain. Then the brain and spine was used for food for animals. Double concentrating the chemical ticks boxes on lidocaine in the British and European medical journal.
Why was it withdrawn from use with animals for food consumption?
Elderly people sometimes come out of operations and show signs of dementia. This is likely because their brain is damaged by the chemicals due to slow filtration of their kidneys.
Retardation in children could be side effects from chemicals. Again, their kidneys cannot filter chemicals out of their system at the normal pace of an average age adult.