Sea Kelp Capsules 4200mg, 120 capsules
£9.99 for 120 capsules at Simply Supplements. That works out at 6p per 150 µg iodine, which ranks it 1st of the 3 kelp products we price across 3 UK retailers.
At one 150 µg dose a day, this pack lasts 5 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 120 ÷ 3 per serving = 40
- In the pack: 40 × 600 µg = 24 mg
- £9.99 ÷ 24 mg × 150 µg = 6.24p per 150 µg iodine
- A week 6.24p × 7 = 44p · a month × 30 = £1.87 · a year × 365 = £22.79
- Amount per serving: stated on the label.
The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.
How it compares: kelp
All 3, ranked →
Ranked purely by price per 150 µg iodine. 24 combination products also contain iodine.
On the label
- Iodine · Kelp
- 600 µg per serving (stated on the label)
- Pack
- 120 capsules · 40 servings · 3 capsule(s) a serving
- Cost per serving
- 25p (40 servings in the pack)
More label details
- Barcode
- 5056049520080
- Sold by
- Simply Supplements
- What the listing says
- “confirmed from the retailer's own product page, not this listing's text: form id kelp; amount per serving 600.0; amount unit mcg; amount refers to elemental; units per serving 3.0; pack units 120; pack unit type capsule”
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One 150 µg dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 3 capsules.
What you paid
Optional. At Simply Supplements today: £9.99.
“Order by” allows 3 working days’ delivery from Simply Supplements and your spare days.
Price history
No price change since 21 September 2026. Checked on 29 days, most recently 20 October 2026.
- Price at every check
- £9.99Simply Supplements
- First recorded
- £9.9921 Sept
- Checked on
- 29 dayssince 21 Sept
- First checked at Simply Supplements: £9.99
Questions about this product
How much does Simply Supplements Sea Kelp Capsules 4200mg cost per 150 µg iodine?
6p per 150 µg iodine, from £9.99 for 120 capsules at Simply Supplements, checked on 20 October 2026.
Is it the cheapest kelp in the UK?
Yes. Of the 3 we price across 3 UK retailers, this is the cheapest per 150 µg iodine.
How long does one pack last?
5 months at one 150 µg dose. The pack holds 24 mg in total.
About Simply Supplements
Founded 2004 · Yaxley, Peterborough, England
Simply Supplements is an online vitamins and supplements retailer that started in Guernsey in 2004 and is now based in Yaxley, near Peterborough. It is the trading name of Pinnacle Health Nutrition Ltd, a privately owned UK company.
All 134 Simply Supplements products, priced per doseVisit Simply Supplements (opens in a new tab)
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