While nickel sits rather camouflaged among its mineral mates in the transition metals of the periodic table, it is a metal that humans are constantly exposed to yet have no need for. What could possibly go wrong? Well, a lot it seems. Nickel is the most prevalent metal allergen worldwide and beyond this there is strong evidence of its potential to trigger autoimmunity, major endocrine pathology and a raft of GIT problems that masquerade as other conditions like IBS & NCGS. This episode captures the dance we all do with the ‘Devil’s Copper’ and why some of our patients are likely to end up with a bigger dose and a much bigger disease picture as a result of noxious nickel.