TABLE 2.
Daily consumption limits for the five heavy metals (μg/day) a
| Hg | Pb | Cr | Cd | As | |
|---|---|---|---|---|---|
| A | — | 0.5 | 8.2 | 4.1 | — |
| B | 20 | 20 | — | 6 | 10 |
| C | 21 (inorganic) | — | 210 | 70 | 21 (inorganic) |
| D | 50 | 250 | 120 | 55 | 150 |
| E | 16 | 250 | — | 70 | 150 |
| F | 2 | 10 | — | 4.1 | 10 |
| G | 16 (methyl) | — | 63 (hexavalent) | 25 | 210 |
A, The California Safe Drinking Water and Toxic Enforcement Act (California Proposition 65) maximum allowable dose levels for chemicals causing reproductive toxicity, μg/day; B, American National Standards Institute (ANSI)/International Dietary Supplement Standard 173 = ANSI 173 Guidelines to the Dietary Supplement; C, United States Environmental Protection Agency (EPA) daily reference doses, μg/day; D, The Food and Agricultural Organization/World Health Organization Joint Expert Committee on Food Additives Acceptable Daily Intakes; E, Europe/WHO; F, American Herbal Products Association (AHPA); G, The European Food Safety Authority (EFSA).
A few regulation presented limits as tolerable weekly intake. Such thresholds were considered and shown as the maximum daily exposure in Table 2.