← Back to directory

Sunday Natural Organic Iodine 250 µg from kelp, 120 capsules

Partial reportLab: GBAReport: 6 Oct 2026Batch: L07624; 26-07057

About Seaweed: what it is, forms and doses →

Compare all 6 Seaweed →

MineralsEU sellerPartial report
A recent independent report exists, but it is partial: pass/fail only, no batch number, or some tests outside the lab’s accreditation

Score Not enough data How we score →

Evidence note: Pass/fail certificate only: it states compliance with EU limits but gives no measured values, so we list it as a partial report.

Lab report

Lab-test status
Partial reportReport
Lab
GBA Gesellschaft für Bioanalytik mbH, Hamburg (DAkkS D-PL-14170-01-00)
GBA certificate (Untersuchungsbescheinigung) for test report 26046818-001 (Bio Jod 250µg)
Batch
L07624; 26-07057
Report date
6 Oct 2026
Heavy metals (mg/kg)
Pb Pass* (certificate states compliance, no figure)Cd Pass* (certificate states compliance, no figure)Hg Pass* (certificate states compliance, no figure)As Tested† (tested, but the certificate gives no figure or verdict)
Fillers
None
Heavy-metal colours: Well under the EU limit (below half) or below detection Near the EU limit (half the limit up to the limit) Over the EU limit Grey: no EU limit (arsenic), not tested, or the lab’s reporting limit is above the EU limitEU 2023/915 limits for food supplements: lead (Pb) 3.0, cadmium (Cd) 1.0, mercury (Hg) 0.10 mg/kg. Values in mg/kg. NT = not tested; c = calculated by us from µg per serving.
Ingredient
Seaweed
Brand
Sunday Natural
Testing rule for this category
Third-party heavy-metal testing required
Status detail
A recent independent report exists, but it is partial: pass/fail only, no batch number, or some tests outside the lab’s accreditation
Reviewer notes
Partial report: GBA Hamburg (DAkkS) certificate of 6 Oct 2026 (test report 26046818-001, batch L07624; 26-07057) states that lead, cadmium and mercury meet the EU 2023/915 limits and that arsenic, inorganic arsenic and microbiology were tested, but gives no values. Sold by Sunday Natural’s Spanish (€) and UK (£) shops.
Product page
Sunday Natural (sunday-natural.es, EU)
Sunday Natural (sunday-natural.co.uk) (UK seller)

⚠ 3 red flags

  • Pass/fail certificate only: it states compliance with EU limits but gives no measured values, so we list it as a partial report.
  • Iodine per capsule is above the 100 µg per daily dose that Germany’s BfR recommends as the maximum for supplements (150 µg in pregnancy and breastfeeding); ask a doctor or pharmacist first if you have a thyroid condition.
  • The sample was sent in by the brand: check the batch number on your pack.

Purity & biohacker panel

Facts only, no scores. Lab: GBA Gesellschaft für Bioanalytik mbH, Hamburg (DAkkS D-PL-14170-01-00) · GBA certificate (Untersuchungsbescheinigung) for test report 26046818-001 (Bio Jod 250µg) · batch L07624; 26-07057 · dated 2026-10-06 (report age 1 months).

Cleanliness checks

Free of fillers and additivesYes
Seller lists organic kelp (Ascophyllum nodosum) and gum arabic as the only other ingredient, in an HPMC capsule · seller page
Full ingredient list publishedYes
Organic kelp (Ascophyllum nodosum) 342 mg = 250 µg iodine per capsule, gum arabic; capsule: HPMC · seller page
Lead (Pb)Yes
Pass (no value): meets the EU 2023/915 limit for supplements, per the certificate · lab report
Cadmium (Cd)Yes
Pass (no value): meets the EU 2023/915 limit for supplements, per the certificate · lab report
Mercury (Hg)Yes
Pass (no value): meets the EU 2023/915 limit for supplements, per the certificate · lab report
Arsenic (As)Tested
Tested (total and inorganic arsenic), no value given; no EU limit for supplements · lab report
MicrobiologyYes
GBA certificate: microbiology (total count, yeasts, moulds, Enterobacteriaceae, E. coli, Salmonella, coagulase-positive staphylococci) unremarkable, no values given · lab report
PesticidesUnknown
Not in the published report · no source
Label accuracy (measured vs claim)Unknown
Iodine not on the certificate · no source

Biohacker parameters

Form
Capsules · seller page
Dose per serving
1 capsule a day = 250 µg iodine declared (167% NRV) · seller page
Servings per pack
120 capsules = 120 days · seller page
Price / cost per daily dose
€12.90 / 120 capsules ≈ €0.11 per day at 1 capsule on sunday-natural.es; £12.90 / 120 capsules ≈ £0.11 per day on sunday-natural.co.uk (calculated, checked 26 Oct 2026). € and £ prices are separate sellers, not converted. · seller page
Branded ingredient
Unknown · no source
Sourced / made in
Organic kelp from the Outer Hebrides, Scotland (seller); Sunday Natural Products GmbH, Berlin · seller page
Capsule material
HPMC (plant cellulose) capsule · seller page
Allergens
Unknown · no source
Vegan
Yes · seller page
Third-party certifications
Unknown (lab report only) · no source
Report age
1 months · lab report

Unknown = not published or not verifiable. Prices from the linked seller page, checked 26 Oct 2026.

Testing evidence

Other Seaweed options