Table 3.
Results of farmed and wild heavy metals concentrations in samples collected from the base of sugar kelp blades, and in relation to relevant industry standards (see Table 2). Horizontal dashes indicate no standard.
| AsT | iAs | Cd | Pb* | Hg | |
|---|---|---|---|---|---|
| Base of blade concentrations in dried samples | |||||
| Samples that exceeded maximum contaminant level | |||||
| Farmed | 88% | 0% | 88% | 0% | 0% |
| Wild | 96% | 0% | 80% | 0% | 6% |
| % of maximum allowable dose level | |||||
| Farmed | – | – | 34% | 164% | 13% |
| Wild | – | – | 39% | 198% | 13% |
| % of no significant risk level | |||||
| Farmed | – | 1.12% | – | 5.4% | – |
| Wild | – | 1.03% | – | 6.6% | – |
| Grams of dried kelp safe to eat | |||||
| Farmed | No standard | 89 | 3.0 | 18.5 | 7.7 |
| Wild | No standard | 97 | 2.6 | 15 | 7.7 |
| Base of blade concentrations converted to wet weight | |||||
| Samples that exceeded maximum contaminant level | |||||
| Farmed | – | – | 0% | 0% | 0% |
| Wild | – | – | 0% | 0% | 0% |
| % of maximum allowable dose level | |||||
| Farmed | – | – | 0.29% | 1.4% | 0.13% |
| Wild | – | – | 0.33% | 1.6% | 0.10% |
| % of no significant risk level | |||||
| Farmed | – | 0.01% | – | 0.05% | – |
| Wild | – | < 0.01% | – | 0.05% | – |
| Grams of wet kelp safe to eat | |||||
| Farmed | No standard | > 10,000 | 345 | 2000 | 769 |
| Wild | No standard | > 1 million | 303 | 2000 | 1000 |