I thought 'black knife' haha. What does that say about me?...hang on....ahh it's ok, the voice in my head told me it's cool, just the pharmaceutical industry spreading fear & drumming up new business. Well 'he' was right about those tin-foil hats. Bloody useless. Anyone who thinks wearing one would benefit from them somehow is just plain delusional. Anybody who knows anything about the subject uses LEAD . Should be obvious really......