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.

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).

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.

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).

• Potassium IodateVitamin Research Products50,000 mcg
• IodineBio-Tech Pharmacal50,000 mcg
• Iodoral IOD - 50Optimox50,000 mcg
• Iodine & RhodiolaDr. Wong's Essentials30,000 mcg
• Thyroid CareTerry Naturally30,000 mcg
• Thyroid CareEuroMedica30,000 mcg
• Thyroid Care PlusTerry Naturally30,000 mcg
• Tri-Iodine 25 mgTerry Naturally25,000 mcg

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.

In which products and brands?

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 3 of 133), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Accell TherapeuticSystemic Formulas45 mcg
• ActathroidNutrients for Health150 mcg
• Activated Coral CalciumNatures Plus · off the market150 mcg
• Activated Coral CalciumNaturesPlus150 mcg
• ActivatorNutri-Spec150 mcg
• ActiveComplete Active150 mcg
• ActiveGNC Women's Ultra Mega150 mcg
• Active 55Buried Treasure Liquid Nutrients100 mcg
• Active 55 Plus Senior ComplexBuried Treasure · off the market100 mcg
• Active ChocolateGNC Women's Ultra Mega150 mcg
• Active Kids CompleteOneSource · off the market75 mcg
• Active ManMET-Rx150 mcg
• Active Man's FormulaVitabase150 mcg
• Active Men's Alpha-MultiVivid Health Nutrition150 mcg
• Active Milk ChocolateGNC Women's Ultra Mega150 mcg
• Active Mixed BerryGNC Ultra Mega Green150 mcg
• Active MultiFINAFLEX50 mcg
• Active Multi PacksMET-Rx150 mcg
• Active Multi ViteGenestra Brands200 mcg
• Active Multi Vite Gummies Natural Raspberry-Lemon FlavorGenestra Brands112 mcg
• Active Multi Vite Without Vitamin AGenestra Brands200 mcg
• Active One Multi with IronSwanson Premium Brand · off the market150 mcg
• Active Seniors UnflavoredAll One180 mcg
• Active VanillaGNC Women's Ultra Mega150 mcg
• Active Vanilla CremeGNC Women's Ultra Mega150 mcg
• Active Vanilla FlavorReliv38 mcg
• Active Vitamin PackKirkland Signature150 mcg
• Active without IronGNC Women's Ultra Mega150 mcg
• Active WomanMet-Rx150 mcg
• Active Woman's MultiVitabase250 mcg
• Active Women's MultivitaminSuper Nutrition250 mcg
• ActiveEssentialsXYMOGEN · off the market50 mcg
• ActiveMVdotFIT25 mcg
• ActivEssentialsXYMOGEN · off the market50 mcg
• ActivEssentials For WomenXYMOGEN · off the market50 mcg
• ActivEssentials with CalciumXYMOGEN · off the market50 mcg
• ActivEssentials With OncoPlex & D3XYMOGEN EP · off the market50 mcg
• ActivEssentials with OncoPLEX & D3XYMOGEN · off the market50 mcg
• ActiVitBeachBody150 mcg
• ActiVit Body Toning FormulaBeachbody Nutritionals75 mcg
• ActiVit Metabolism FormulaBeachbody Nutritionals150 mcg
• Activite SportMHP Maximum Human Performance150 mcg
• ActivNutrientsXYMOGEN50 mcg
• ActivNutrients Chewable Natural Mixed Berry FlavorXYMOGEN75 mcg
• ActivNutrients PerformanceXYMOGEN17 mcg
• ActivNutrients PhytoXYMOGEN15 mcg
• ActivNutrients without Copper & IronXYMOGEN50 mcg
• ActivNutrients without Copper & Iron Multivitamin PowderXYMOGEN · off the market150 mcg
• ActivNutrients without Copper & Iron Multivitamin Powder Natural Fruit Punch FlavorXYMOGEN150 mcg
• ActivNutrients without IronXYMOGEN50 mcg

Where next?

• Iodine drops
• Liquid iodine
• Check an amount of iodine
• Labels above the upper limit
• All ingredients