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Cheapest Organic Kelp on iHerb

Ranked by real cost per 100 mg of Organic Kelp — cheapest value first.

Prices updated Jul 25, 2026 · 8 products · Prices in USD

The priciest option here costs about 269.5× more per 100 mg of Organic Kelp than the best-value pick Bluebonnet Nutrition. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
Bluebonnet Nutrition, Atlantic Sea Kelp Iodine, 225 mcg, 120 Vegetable Capsules
Bluebonnet Nutrition, Atlantic Sea Kelp Iodine, 225 mcg, 120 Vegetable Capsules
Bluebonnet Nutrition
132 mg12014.360.091View on iHerb →
2
Zhou Nutrition, Total Greens, 120 Tablets
Zhou Nutrition, Total Greens, 120 Tablets
Zhou Nutrition
500 mg3021.190.141View on iHerb →
3
Kuli Kuli, Organic Superfood Blend, Marine Glow, 6 oz (170 g)
Kuli Kuli, Organic Superfood Blend, Marine Glow, 6 oz (170 g)
Kuli Kuli
88 mg2815.990.649View on iHerb →
4
New Chapter, Perfect Postnatal™ Multivitamin, 192 Vegetarian Tablets
New Chapter, Perfect Postnatal™ Multivitamin, 192 Vegetarian Tablets
New Chapter
90 mg6454.970.954View on iHerb →
5
Divine Health, Dr Colbert M.D. Thyroid Zone, 90 Veggie Capsules
Divine Health, Dr Colbert M.D. Thyroid Zone, 90 Veggie Capsules
Divine Health
100 mg3038.691.29View on iHerb →
6
Nature's Answer, Thyroid Blend, 90 Vegetarian Capsules
Nature's Answer, Thyroid Blend, 90 Vegetarian Capsules
Nature's Answer
7 mg4526.999.23View on iHerb →
7
Greens First, Greens Powder, Mint, 9.97 oz (282.9 g)
Greens First, Greens Powder, Mint, 9.97 oz (282.9 g)
Greens First
15 mg3054.9912.22View on iHerb →
8
Greens First, Greens Powder Capsules, 180 Capsules
Greens First, Greens Powder Capsules, 180 Capsules
Greens First
8 mg3054.9924.44View on iHerb →

How we rank Organic Kelp

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.