Have you ever noticed how difficult it is to find copper supplements in stores? In your regular shops, they went extinct! iHerb.com has a variety of options. I've been taking copper slightly more than recommended, for majority of our vegetation (derived from our soils) do not contain the adequate amount. It's the best kept secret in our modern world, in the mainstream. No wonder these days you see people in their 20s and 30s already turning grey.