The best third-party-tested krill oil, by IKOS lot results
Last reviewed 2026-10-13. Every certification record and lot result below was read from its source on that date, and each links it. No price is shown.
2 krill oils sold as an exact Amazon listing have a public IKOS lot report from Nutrasource: Sports Research Antarctic Krill Oil 500 mg (Superba2), 120 mini-softgels and Viva Naturals Antarctic Krill Oil 1,250 mg, 6 bottles of 60 Caplique capsules. On the newest report for each, every line (EPA, DHA, phospholipids, peroxide, PCBs, dioxins and four heavy metals) is marked compliant with the IKOS limit. MegaRed, Kori and Bronson are not in the IKOS directory (checked Oct 13, 2026).
What “third-party tested” means here
- IKOS is Nutrasource's krill oil programme, the krill version of IFOS. Each listed lot has a public report: measured omega-3 and phospholipid content against the label, oxidation, PCBs, dioxins and heavy metals, each against a fixed limit (how IKOS works).
- The order is by brand. Both products are on the list; this is not a quality or effectiveness ranking, and no price is shown.
- A lot report covers one lot. The bottle in your hand can be a different lot. The lot number is printed on the bottle; the certificate pages list every lot Nutrasource shows.
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you — commission never changes which products appear or their order (how this site is funded).
| Product | IKOS entry | Newest lot (expiry) | Serving | EPA / DHA measured | Peroxide | Lead | Mercury | |
|---|---|---|---|---|---|---|---|---|
| Sports Research Antarctic Krill Oil 500 mg (Superba2), 120 mini-softgels | SPRT0053 | UC260233 (2029-03) | 1 softgel | 82 mg / 40 mg | 0.18 meq/kg | below 0.0059 ppm | below 0.0111 ppm | Amazon → |
| Viva Naturals Antarctic Krill Oil 1,250 mg, 6 bottles of 60 Caplique capsules | VIVN0006 | 2508055 (2027-11) | 2 capsules | 177 mg / 103 mg | 0.79 meq/kg | below 0.0063 ppm | below 0.0119 ppm | Amazon → |
No price is shown: prices change, and the price at the store is the one to check. “Below” means the lab's detection limit: the metal was not found above that level. EPA and DHA are the lab's batch results for the serving on the report, not the label figure.
The certificate for each product
- Sports Research krill oil: the IKOS certificate, line by line
- Viva Naturals krill oil: the IKOS certificate, line by line
Other IKOS entries from these two brands
Nutrasource also lists these. They are not linked here because no Amazon listing was matched to them in this check:
- Sports Research: Omega-3 Krill Oil 1000mg (SPRT0001)
- Sports Research: Double Strength Omega-3 Krill Oil 1000mg (90 softgels) Costco (SPRT0089)
- Viva Naturals: Viva Naturals Krill oil 1200mg (VIVN00011)
Not in the IKOS directory
On Oct 13, 2026 the IKOS filter of the Nutrasource directory showed 27 krill products, and the directory's 429 brands included no brand named MegaRed, Kori, Bronson or Schiff. The NSF Certified for Sport list (2,570 listings) had no product with “krill” in its name. That is a statement about those two lists, not a finding that a product is untested: is MegaRed krill oil third-party tested?
For fish oil, see the best third-party-tested fish oil and third-party tested omega-3, explained.
This page restates published certification records and lot reports with attribution. It makes no health, benefit or treatment claim, gives no dosing advice, and says nothing about whether any product is safe or right for you. Krill is a crustacean: check the full ingredient list against your own needs.
Links to Amazon on this page are affiliate links: as an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Which products appear, and their order, was settled by the certification records before any link was attached. Price plays no part.
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