Table 1.
Recommended daily intake standards (in mg/kg) for adults and pregnant women
| Recommended standards | Variables | Adults | Pregnancy | References |
|---|---|---|---|---|
| Recommended daily allowance (RDA) | Aluminum (Al) | 0.10 – 0.12 | – | ATSDR (2011) |
| Calcium (Ca) | 1 200 – 1 300 | 1 000 – 1 300 | IOM (1997) | |
| Magnesium (Mg) | 240 – 420 | 350 – 400 | ||
| Copper (Cu) | 0.9 | 1 | IOM (2001) | |
| Iron (Fe) | 8 – 18 | 27 | ||
| Silica (Si) | 12 | 19 | ||
| Zinc (Zn) | 8 – 11 | 11 | ||
| Adequate intake (AI) | Chloride (Cl−) | 100 | 100 | IOM (2005) |
| Nitrate (NO3-) | 3.7 | 3.7 | ||
| Nitrite (NO2-) | 0.06 | 0.06 | ||
| Potassium (K) | 2 300 – 3 400 | 2 600 – 2 900 | ||
| Sodium (Na) | 1 200 – 1 500 | 1500 | ||
| Chromium (Cr) | 0.025 – 0.035 | 0.029 – 0.030 | IOM (2001) | |
| Manganese (Mn) | 1.8 – 2.3 | 2 | ||
| Cobalt (Co) | 0.003 – 0.008 | 0.003 – 0.008 | ATSDR (2004) | |
| Sulphate (SO42−) | 14 | 14 | NRC (2005) | |
| Tolerable upper intake level (UL) | Arsenic (As) | 0.0005 – 0.00081 | 0.0005 – 0.00081 | IOM (2001) |
| Nickel (Ni) | 1 | 1 | ||
| Lead (Pb) | 0.01 | 0.01 | ATSDR (2017) |