Whilst copper is needed in small quantities, in larger or unbalanced amounts, it is a bad thing.
Think of telephone wires and electricity cables. Copper is used as a conductor of electricity. It is an excitatory metal.
Copper has an affinity to go to the brain in individuals, along with the kidneys and the ovaries.
This copper has the same effect on mental status. It is excitatory and agitating. It causes anxiety and great nervous tension. It can cause wild mood swings and a "Jackal and Hyde" type personality.
One of the reasons for this is that zinc is needed to keep copper in balance. They are what is known as antagonists. If a person gets a higher amount of copper in their diet, their zinc levels will lower, and vice versa.
A person who has kryptopyrroles that bind to zinc and make them unusable is going to be naturally lower in zinc.
This will mean that the copper they have in their body will be allowed to rise to levels that are unbalanced.