PlainVitamins

mineral

Iodine supplements

Half of the 6,382 iodine supplements in the NIH label database that print an amount list 150 mcg or less per serving; the middle half list 75 mcg to 150 mcg, and 1 in 67 of the 6,300 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 110 products whose only supplement ingredient is iodine list a median of 237.5 mcg, and 34% of them give more than the upper limit.

Products listing it
6,6366,382 print an amount; 251 list it inside a blend without an amount
Median per serving
150 mcgmiddle half 75 mcg to 150 mcg
FDA Daily Value
150 mcgthe median is 100% of it
Adult upper limit (IOM)
1,100 mcg94 products go above it a day

How much iodine do supplements contain?

The median product lists 150 mcg per serving. One in ten lists 37.5 mcg or less, one in ten 225 mcg or more. The amount printed most often is 150 mcg (2,658 products).

Products by amount of iodine per serving

6,382 products, log scale; extreme 0.2% at each end left out of the drawing.

Iodine: products by amount per serving3 mcg30 mcg300 mcg3,000 mcgDaily Value 150 mcgUpper limit 1,100 mcg
Iodine: products by amount per serving3 mcg30 mcg300 mcg3,000 mcgDaily Value 150 mcgUpper limit 1,100 mcg
Iodine: products by amount per serving3 mcg10 mcg100 mcg1,000 mcg10,000 mcgDaily Value 150 mcgUpper limit 1,100 mcg
Iodine: products by amount per serving3 mcg10 mcg30 mcg100 mcg300 mcg1,000 mcg10,000 mcgDaily Value 150 mcgUpper limit 1,100 mcg
Iodine: products by amount per serving3 mcg10 mcg30 mcg100 mcg300 mcg1,000 mcg3,000 mcg10,000 mcg30,000 mcgDaily Value 150 mcgUpper limit 1,100 mcg
The amounts printed most often
Amount per servingProductsFor example
150 mcg2,658 Sport (GNC Mega Men); Maximum Nutrition Vanilla Bean (GNC Mega Men); Maximum Nutrition Vanilla Creme (GNC Women's Ultra Mega)
75 mcg567 Amazing Rainforest Discovery Yerba Mate Power-Burn Diet (Applied Nutrition); Complete Minerals Ultra Strength (Viva Vitamins); Every Woman's One Daily (New Chapter Organics)
100 mcg397 Ultra Vita-Min Iron Free (Puritan's Pride); Weight Management Pack (Douglas Laboratories); Men's Health Pack (Douglas Laboratories)
50 mcg277 Coral Calcium Plus (MicroTech Professional Formulations); Apple Cider Complete (GNC Natural Brand); Teen Multiple (FemTeen Symmetry)
225 mcg235 Potassium Iodide 130 mg (Hi-Tech Pharmaceuticals); Kelp With Iodine (VitaCeutical Labs); Ultra Minerals (Vitabase)
200 mcg133 MAX-Advantage (Indiana Botanic Gardens); Super Herb Diet MAX-Advantage (Indiana Botanic Gardens); Ultra Preventive Beta With Copper & Iron (Douglas Laboratories)
80 mcg110 One All-In-One Nutritional Shake Berry (Vega); VitaCraves Gummies (Bayer One A Day); One All-In-One Nutritional Shake Chocolate (Vega)
30 mcg100 Premium Soy Protein Isolate Powder Chocolate (Vitamin World); Marvel The Amazing Spider-Man Gummies (Sundown); Disney-Pixar Finding Nemo Gummies MultiVitamin (NatureSmart)
300 mcg89 Heart Support (NOW); Essentials Multivitamin And Mineral Without Iron (Martin Avenue Pharmacy); ChildEssence (Integrative Therapeutics)
40 mcg88 Flintstones Gummies Vita-Packs On-The-Go (Bayer); Flintstones Gummies (Bayer); Scooby-Doo! Gummies (Bayer One A Day Kids)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for iodine is 150 mcg (adults and children 4 and older). The median product gives 100% of it per serving; the 90th percentile 150%.

The adult Tolerable Upper Intake Level is 1,100 mcg a day (total intake from food, water and supplements). At the most servings their labels direct, 94 of the 6,300 products with a plausible amount (1.5%) give more than that from the supplement alone (what counts as plausible).

The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.

Sources: 21 CFR 101.9(c)(8)(iv) (Daily Values); Institute of Medicine, DRI summary tables (2011) (upper limits); on reading them, the FDA's Daily Value page.

Which products list the most iodine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 150 mcg; those entered in 2025, 150 mcg.

Median iodine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
2011149150 mcg
2012433150 mcg
2013538150 mcg
2014256150 mcg
2015268150 mcg
2016310150 mcg
2017329150 mcg
2018280120 mcg
2019331150 mcg
2020640150 mcg
2021514104.5 mcg
2022643150 mcg
2023580150 mcg
2024598150 mcg
2025513150 mcg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing iodine by DSLD product type

Iodine by product typeOther Combinations4,719Multi-Vitamin and Mineral (MVM)864Botanical with Nutrients500Mineral231Amino acid/Protein28Non-Nutrient/Non-Botanical18Botanical15Vitamin4
Iodine by product typeOther Combinations4,719Multi-Vitamin and Mineral (MVM)864Botanical with Nutrients500Mineral231Amino acid/Protein28Non-Nutrient/Non-Botanical18Botanical15Vitamin4
Iodine by product typeOther Combinations4,719Multi-Vitamin and Mineral (MVM)864Botanical with Nutrients500Mineral231Amino acid/Protein28Non-Nutrient/Non-Botanical18Botanical15Vitamin4
Iodine by product typeOther Combinations4,719Multi-Vitamin and Mineral (MVM)864Botanical with Nutrients500Mineral231Amino acid/Protein28Non-Nutrient/Non-Botanical18Botanical15Vitamin4
Iodine by product typeOther Combinations4,719Multi-Vitamin and Mineral (MVM)864Botanical with Nutrients500Mineral231Amino acid/Protein28Non-Nutrient/Non-Botanical18Botanical15Vitamin4

Brands listing it most: Nature's Way (201), Douglas Laboratories (159), Nature's Plus (158), Centrum (69), Bronson (57), New Chapter (57), XYMOGEN (56), NOW (51), Metagenics (50), Rainbow Light (48).

Every product listing iodine

6,636 products, A to Z by name (page 125 of 133), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?