Oxygen is in brain due to iron poisoning. Iron attracts oxygen, causing free radicals.
Iron is loosely bound in blood cells & breaks off easily, causing vascular damage; in this case in the vascular system of the brain. Iron is TIGHTLY bound to toxic proteins: bacteria, cancer, Alzheimer's, tumors, etc. ALL pathogens require iron to thrive and replicate.
Bio-available copper is THE ANTI-OXIDANT; copper neutralizes and mobilizes iron out of the body.