Wow this thread went into a frenzy! I can't keep up with all the loooooong posts. But it was mentioned above that zinc causes inflammation??? I have a love/hate relationship with zinc and copper. My problem is that allergies destroy mucous membranes and rebuilding them takes a horrendous amount of zinc (75 mg/day for a cold, 150mg/day for my allergies). If I take enough zinc I can breathe again in 15 minutes. So it's kinda clear. Despite taking high amounts of zinc and no copper before age 50 my hair alaysisees showed no copper deficiency until suddenlt I turned up borderline copper deficient at age 50. It turns out that estrogen helps you absorb copper (and testosterone prolly does as well because it is rare for young men to be low in copper). I stopped taking zinc after 50 because of the copper issue and then suddenly developed ne allergies I never had before. It took me 4 years to tie that to stopping zinc supplementation (as opposed to believing I was falling apart at menopause). Now I have not found any reason to think (or seen any study that showed) a copper loss due to allergies, so I no longer believe there is a zinc: copper ratio. I try to take 5mg copper / day regardless of how much zinc I take. It is hard on me to have such big swings of zinc. I am finding that I have all sorts of allergies I thought I was impervious to before but now realise I am just rebuilding my tissues constantly from the daily zinc. It concerns me greatly. Both zinc and copper can hurt my stomach. I have no idea why sometimes they do not bother me at all and other times quite a bit. SOmeone else mentioned taking zinc in relation to the thyroid and adrenal glands. I want to make you especially CBS'ers who maybe are not eating enough protein think about this: you need tyrosine to make thyroid hormone and also to make one of the adrenal hormones (and also dopamine). My doctor prescribed 1g tyrosine/day for me and some days I find I need to take 1.5-2 g if I eat low protein meals. If you do not make enough thyroxine you will eventually not make enough adrenal hormone either (and when that happens you will get low blood pressure (even if you have 3 genes causing high blood pressure) and you will need salt or pass out. So don't just consider zinc regarding your thyroid, but also tyrosine. In fact, think about your zinc requirements. If you have allergies you need extra zinc (maybe not as much as me?) but if not it might be SIMPLY THE TYROSINE that you need.