Arsenic can be hazardous for humans and animals when ingested as fine particles of dust or consumed in
contaminated water. The uptake of arsenic by plants is associated with a change in speciation (methylated or
complexes as phytochelatins) that also changes its toxicity, although some authors consider that plants rarely
accumulate Arsenic to toxic levels. If viewed concentration of arsenic in leaves, stems and flowers of Stevia
rebaudiana as shown in Table 2, these were still lower than the total concentration normal range arsenic in plants,
see Table 1.