Is zinc harmful to humans?

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  1. #excessive
  2. #toxic
  3. #highly
  4. #plants
  5. #bacteria
  6. #trace
  7. #humans
  8. #essential
  9. #toxicity
  10. #solution
  11. #invertebrates
  12. #copper
  13. #metal
  14. #vertebrate
  15. #suppress
  16. #absorption