Element

Potential health risk(s)

Ref

Lead

Brain damage, paralysis, abdominal pain, bone pain, anaemia and gastrointestinal symptoms

[18]

Cadmium

Kidney, lung, liver reproductive and skeletal damage, cancer

[19]

Arsenic

Carcinogenic (bladder, lung and skin cancers)

[20]

Mercury

Brain and kidney damage

[20]