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Cheapest Iodine (as potassium Iodide) on iHerb

Ranked by real cost per 100 mcg of Iodine (as potassium Iodide) — cheapest value first.

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

The priciest option here costs about 254.0× more per 100 mcg of Iodine (as potassium Iodide) than the best-value pick Nature's Life. 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 mcg
1
Nature's Life, Icelandic Kelp, 41 mg, 500 Tablets
Nature's Life, Icelandic Kelp, 41 mg, 500 Tablets
Nature's Life
225 mcg50015.190.014View on iHerb →
2
Nutricost, Iodine, 325 mcg, 240 Tablets
Nutricost, Iodine, 325 mcg, 240 Tablets
Nutricost
325 mcg24011.950.015View on iHerb →
3
Nature's Way, Prenatal Multivitamin, 180 Capsules
Nature's Way, Prenatal Multivitamin, 180 Capsules
Nature's Way
158 mcg9013.940.098View on iHerb →
4
Deva, Vegan Tuba Prime®, Multivitamin, High Potency, 90 Coated Tablets
Deva, Vegan Tuba Prime®, Multivitamin, High Potency, 90 Coated Tablets
Deva
150 mcg4513.590.201View on iHerb →
5
Rainbow Light, Women's One™ 50+ Daily Multivitamin, High Potency, 90 Vegetarian Tablets
Rainbow Light, Women's One™ 50+ Daily Multivitamin, High Potency, 90 Vegetarian Tablets
Rainbow Light
150 mcg9028.040.208View on iHerb →
6
Rainbow Light, Women's One™ 50+ Daily Multivitamin, High Potency, 120 Vegetarian Tablets
Rainbow Light, Women's One™ 50+ Daily Multivitamin, High Potency, 120 Vegetarian Tablets
Rainbow Light
150 mcg12038.240.212View on iHerb →
7
Life Extension, Thyroid Support Complex, 60 Capsules
Life Extension, Thyroid Support Complex, 60 Capsules
Life Extension
350 mcg3026.250.250View on iHerb →
8
Deva, Vegan Tuba Prime™, Multivitamin, Iron Free, High Potency, 90 Coated Tablets
Deva, Vegan Tuba Prime™, Multivitamin, Iron Free, High Potency, 90 Coated Tablets
Deva
150 mcg4516.990.252View on iHerb →
9
Nature's Craft, Thyroid Support , 120 Capsules
Nature's Craft, Thyroid Support , 120 Capsules
Nature's Craft
150 mcg6027.990.311View on iHerb →
10
NaturesPlus, Animal Parade, Children's Chewable Supplement, Watermelon, 180 Animal-Shaped Tablets
NaturesPlus, Animal Parade, Children's Chewable Supplement, Watermelon, 180 Animal-Shaped Tablets
NaturesPlus
100 mcg9029.280.325View on iHerb →
11
Bariatric Fusion, Multivitamin Without Iron, 180 Capsules
Bariatric Fusion, Multivitamin Without Iron, 180 Capsules
Bariatric Fusion
150 mcg9047.990.356View on iHerb →
12
Futurebiotics, The 30 Day Beauty Secret, 30 Packets
Futurebiotics, The 30 Day Beauty Secret, 30 Packets
Futurebiotics
175 mcg3019.970.380View on iHerb →
13
Nature's Way, Alive! Max3 Potency, Adult Complete Multivitamin, No Added Iron, 180 Tablets
Nature's Way, Alive! Max3 Potency, Adult Complete Multivitamin, No Added Iron, 180 Tablets
Nature's Way
150 mcg6036.310.403View on iHerb →
14
Nature's Way, Alive!® Max3 Potency, Men's Complete Multivitamin, 90 Tablets
Nature's Way, Alive!® Max3 Potency, Men's Complete Multivitamin, 90 Tablets
Nature's Way
150 mcg3020.970.466View on iHerb →
15
Bariatric Fusion, Multivitamin Without Iron , 60 Capsules
Bariatric Fusion, Multivitamin Without Iron , 60 Capsules
Bariatric Fusion
150 mcg3021.990.489View on iHerb →
16
Nature's Way, Alive!® Max 6 Potency, Adult Complete Multivitamin, With Iron, 90 Capsules
Nature's Way, Alive!® Max 6 Potency, Adult Complete Multivitamin, With Iron, 90 Capsules
Nature's Way
150 mcg1511.610.516View on iHerb →
17
Nature's Way, Alive!® Max6 Potency, Adult Complete Multivitamin, No Added Iron, 90 Capsules
Nature's Way, Alive!® Max6 Potency, Adult Complete Multivitamin, No Added Iron, 90 Capsules
Nature's Way
150 mcg1511.610.516View on iHerb →
18
NaturesPlus, Animal Parade Gold, Children's Chewable Supplement, Cherry, Grape & Orange, 60 Animal-Shaped Tablets
NaturesPlus, Animal Parade Gold, Children's Chewable Supplement, Cherry, Grape & Orange, 60 Animal-Shaped Tablets
NaturesPlus
100 mcg3016.110.537View on iHerb →
19
Gaia Herbs, Thyroid Support, 120 Liquid Phyto-Caps®
Gaia Herbs, Thyroid Support, 120 Liquid Phyto-Caps®
Gaia Herbs
100 mcg6049.490.825View on iHerb →
20
NaturesPlus, Source of Life Original, Multi-Vitamin & Mineral Supplement, 90 Tablets
NaturesPlus, Source of Life Original, Multi-Vitamin & Mineral Supplement, 90 Tablets
NaturesPlus
150 mcg3040.330.896View on iHerb →
21
Pure Essence, LifeEssence, Whole Food Based Multivitamin, 240 Tablets
Pure Essence, LifeEssence, Whole Food Based Multivitamin, 240 Tablets
Pure Essence
150 mcg6090.141.00View on iHerb →
22
Pure Essence, LifeEssence™, 120 Tablets
Pure Essence, LifeEssence™, 120 Tablets
Pure Essence
150 mcg3050.271.12View on iHerb →
23
NaturesPlus, Source of Life, Gold Chewables, Delicious Tropical Fruit Flavor, 90 Tablets
NaturesPlus, Source of Life, Gold Chewables, Delicious Tropical Fruit Flavor, 90 Tablets
NaturesPlus
150 mcg3056.911.26View on iHerb →
24
RAPIDFIRE, Vita-Brew, Vitamin Enhanced Coffee, French Roast Espresso Blend, 16 K-Cup, 0.35 oz (10 g) Each
RAPIDFIRE, Vita-Brew, Vitamin Enhanced Coffee, French Roast Espresso Blend, 16 K-Cup, 0.35 oz (10 g) Each
RAPIDFIRE
75 mcg1619.991.67View on iHerb →
25
Vibrant Health, Maximum Vibrance®, Version 7.0, Vanilla Bean, 21.5 oz (610 g)
Vibrant Health, Maximum Vibrance®, Version 7.0, Vanilla Bean, 21.5 oz (610 g)
Vibrant Health
154 mcg1579.203.43View on iHerb →

How we rank Iodine (as potassium Iodide)

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.