It must be durable and available
#5 is Anemia
#6 is Deficiency
and thats all i know from the top of my head
Lithium, Boron, Florine, Silicon, Vanadium, Chromium, Manganese, Zinc, Copper, Nickel, Cobalt, Iron, Arsenic (yes, but in very small amounts), Selenium, Bromine, Strontium, Molybdenum, and Iodine.
