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  Indian J Med Microbiol
 

Figure 1: Essential and non-essential elements. The safe cut-off levels of different heavy metals and their toxic effects on different organ systems are shown in curves. Ca, calcium; Mg, magnesium; Cu, copper; Zn, zinc; Fe, iron; Se, selenium; Mn, manganese; Mo, molybdenum; Pb, lead; Cd, cadmium; Hg, mercury, As, arsenic; Al, aluminium.

Figure 1: Essential and non-essential elements. The safe cut-off levels of different heavy metals and their toxic effects on different organ systems are shown in curves. Ca, calcium; Mg, magnesium; Cu, copper; Zn, zinc; Fe, iron; Se, selenium; Mn, manganese; Mo, molybdenum; Pb, lead; Cd, cadmium; Hg, mercury, As, arsenic; Al, aluminium.