Table 9.1 - Essential metals and medical consequences resulting from their deficiency. a MetalAbundance Sea Water mg/1 (ppm)Diseases Resulting from Metal Deficiency Co1 x 10-4anemia Ni2 x 10-4 Cu3 x 10-3brain disease, anemia, heart disease Zn1 x 10-2growth retardation, skin changes 10 more rows May 3, 2023