(Arjun Walia) There is no shortage of studies demonstrating that aluminum is present in human brain tissue. This is a problem given the fact that aluminum is neurotoxic and wreaks nothing but havoc on biology. This is firmly established in scientific literature. There is no debate on whether or not aluminum exists within human brain tissue, the science is settled. The debate is now focused on how much aluminum is too much. How much aluminum does it take to impact the health of a human being in a negative way?