Heavy metal

Toxic limit

Recommended intake/Safe intake

Arsenic

3 mg/day for 2 - 3 weeks

15 - 25 micro g/day (adults)

Cadmium

200 micro/kg of fresh weight

15 - 50 micro g/day (adults), 2 - 25 micro g/day children

Lead

>500 micro g/L (Blood)

20 - 280 micro g/day (adults), 10 - 275 micro g/day children

Zinc

150 micro/day

15 micro g/day