Creutzfeldt-Jacob disease (CJD), the human form of Mad Cow Disease, is thought to be caused by eating beef from cattle infected with BSE, or Mad Cow, but David Brown, a biochemist at Cambridge University in England, now says ?there is no conclusive proof that [mad cow disease] caused CJD.? He has an environmental explanation for both Mad Cow and CJD.
He thinks the cause is manganese, a heavy metal that is essential to life and part of our human diet. It can be found in common foods such as wheat, rice and tea. Studies have shown that too much manganese can be dangerous to the nervous system.