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Cheapest Iodine (from potassium iodide) on iHerb

Ranked by real cost per 1,000 mcg of Iodine (from potassium iodide) — cheapest value first.

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

The priciest option here costs about 92.1× more per 1,000 mcg of Iodine (from potassium iodide) than the best-value pick SMNutrition. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 1,000 mcg
1
SMNutrition, Organic Nascent Iodine Liquid Drops, Unflavored , 2 fl oz (60 ml)
SMNutrition, Organic Nascent Iodine Liquid Drops, Unflavored , 2 fl oz (60 ml)
SMNutrition
1,100 mcg50019.950.036View on iHerb →
2
Dr. Mercola, Iodine, 1,500 mcg, 90 Capsules
Dr. Mercola, Iodine, 1,500 mcg, 90 Capsules
Dr. Mercola
1,500 mcg9024.190.179View on iHerb →
3
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus
150 mcg302.000.444View on iHerb →
4
Fairhaven Health, Peapod, Prenatal Multivitamin Supplement, 60 Tablets
Fairhaven Health, Peapod, Prenatal Multivitamin Supplement, 60 Tablets
Fairhaven Health
290 mcg6019.951.15View on iHerb →
5
NOW Foods, Thyroid Energy, 90 Veg Capsules
NOW Foods, Thyroid Energy, 90 Veg Capsules
NOW Foods
225 mcg4513.461.33View on iHerb →
6
NOW Foods, Sports, Men's Active Sports Multi, 90 Softgels
NOW Foods, Sports, Men's Active Sports Multi, 90 Softgels
NOW Foods
225 mcg309.961.48View on iHerb →
7
Super Nutrition, SimplyOne®, Women, Multivitamin + Supporting Herbs with Vitamin A, and Organic Botanical Blend, Wild-Berry, 30 Chewables
Super Nutrition, SimplyOne®, Women, Multivitamin + Supporting Herbs with Vitamin A, and Organic Botanical Blend, Wild-Berry, 30 Chewables
Super Nutrition
150 mcg307.661.70View on iHerb →
8
NOW Foods, Full Spectrum Minerals Caps, 240 Capsules
NOW Foods, Full Spectrum Minerals Caps, 240 Capsules
NOW Foods
113 mcg12024.491.81View on iHerb →
9
NOW Foods, Sports, Energy Extreme, 90 Veg Capsules
NOW Foods, Sports, Energy Extreme, 90 Veg Capsules
NOW Foods
150 mcg4513.772.04View on iHerb →
10
Carlson, Super 1 Daily®, 60 Vegetarian Tablets
Carlson, Super 1 Daily®, 60 Vegetarian Tablets
Carlson
225 mcg6027.972.07View on iHerb →
11
Carlson, Mini-Multi, Vitamins & Minerals, 180 Mini Tablets
Carlson, Mini-Multi, Vitamins & Minerals, 180 Mini Tablets
Carlson
75 mcg18029.332.17View on iHerb →
12
Carlson, Mini Multi, 250 Mini Tablets
Carlson, Mini Multi, 250 Mini Tablets
Carlson
75 mcg25041.652.22View on iHerb →
13
NOW Foods, ADAM™, Superior Men's Multi, 180 Softgels
NOW Foods, ADAM™, Superior Men's Multi, 180 Softgels
NOW Foods
225 mcg9047.152.33View on iHerb →
14
NOW Foods, ADAM™, Superior Men's Multi, 90 Softgels
NOW Foods, ADAM™, Superior Men's Multi, 90 Softgels
NOW Foods
225 mcg4524.492.42View on iHerb →
15
Kirkman Labs, Children's Chewable Multivitamin & Mineral, Natural Mango Peach, 120 Tablets
Kirkman Labs, Children's Chewable Multivitamin & Mineral, Natural Mango Peach, 120 Tablets
Kirkman Labs
150 mcg6022.502.50View on iHerb →
16
NOW Foods, EVE™, Superior Women's Multi, 180 Softgels
NOW Foods, EVE™, Superior Women's Multi, 180 Softgels
NOW Foods
225 mcg6034.222.53View on iHerb →
17
NOW Foods, Kid Vits™, Grape Splash, 120 Chewable Tablets
NOW Foods, Kid Vits™, Grape Splash, 120 Chewable Tablets
NOW Foods
70 mcg6011.012.62View on iHerb →
18
NOW Foods, Liquid Multi Gels, 180 Softgels
NOW Foods, Liquid Multi Gels, 180 Softgels
NOW Foods
150 mcg9035.522.63View on iHerb →
19
OLLY, The Essential Prenatal, Sweet Citrus, 84 Gummies
OLLY, The Essential Prenatal, Sweet Citrus, 84 Gummies
OLLY
150 mcg4217.992.86View on iHerb →
20
NOW Foods, EVE, Superior Women's Multi, 90 Softgels
NOW Foods, EVE, Superior Women's Multi, 90 Softgels
NOW Foods
225 mcg3019.592.90View on iHerb →
21
NOW Foods, Kids, Kid Vits™, Juicy Orange, 60 Chewable Tablets
NOW Foods, Kids, Kid Vits™, Juicy Orange, 60 Chewable Tablets
NOW Foods
70 mcg306.112.91View on iHerb →
22
Zhou Nutrition, Daily Boost, 30 Vegetarian Capsules
Zhou Nutrition, Daily Boost, 30 Vegetarian Capsules
Zhou Nutrition
150 mcg3013.292.95View on iHerb →
23
Zahler, Mighty Mini™ Prenatal + DHA, 90 Softgels
Zahler, Mighty Mini™ Prenatal + DHA, 90 Softgels
Zahler
145 mcg9038.972.99View on iHerb →
24
Carlson, Mini Multi, 90 Mini Tablets
Carlson, Mini Multi, 90 Mini Tablets
Carlson
75 mcg9020.833.09View on iHerb →
25
Snap Supplements, Men's Daily Multi Vitamin, 60 Capsules
Snap Supplements, Men's Daily Multi Vitamin, 60 Capsules
Snap Supplements
188 mcg3018.663.32View on iHerb →

How we rank Iodine (from 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.