Organic Roasted Seaweed Snack
by Kirkland Signature
- Purchase location
- Costco, 4801 Central Ave., Richmond CA 94804
- Lot number
- ITM. / ART. 1193197, combined multiple packs: Dec.03.2026 YMS-07 13:57 A; Dec.03.2026 YMS-07 13:57 A; Dec.03.2026 YMS-07 13:58 A; Dec.03.2026 YMS-07 13:57 A; Dec.03.2026 YMS-07 13:57 A;
- Expiration date
- Dec 3, 2026
How this compares — Heavy Metals Panel
Other tested products in the same category & subcategory. Lower is better.
Arsenic (As) over time
Lowest to highest — most recent test
| Product | Comparison bar | Status | View |
|---|---|---|---|
7.1 mg/kg | single test | → | |
12.7 mg/kg | single test | → | |
12.9 mg/kg | single test | → |
The comparison bar shows each product's measured amount as a share of the highest result in this group — the fullest bar simply has the most of the selected analyte, not 100% of any health limit. When a regulatory limit sits close to the readings, the bars scale to that limit instead and it appears as a dotted marker.
Requested Test: Heavy Metals Panel
Tests for lead, arsenic, cadmium, and mercury — toxic metals that can accumulate in the body over time and cause neurological, kidney, and developmental harm, even at low levels.
How The Test Is Performed
The food sample is broken down with acid, then heated into a plasma (an extremely hot gas) that strips the metals into individual atoms. A detector (ICP-MS) then counts each type of metal atom, identifying exactly how much lead, arsenic, cadmium, or mercury is present — even at parts-per-billion levels.
Good foods to test
- •Baby food & infant formula
- •Rice & rice-based products
- •Chocolate & cocoa products
- •Spices (turmeric, cinnamon, oregano)
- •Root vegetables (sweet potatoes, carrots)
- •Fruit juices (apple, grape)
- •Protein powders