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

• Monster Mass Cake BatterCytoSport53 mcg
• Monster Mass ChocolateCytoSportin a blend
• Monster Mass Cookies 'N CremeCytoSport53 mcg
• Monster Mass Strawberries 'N CremeCytoSportin a blend
• Monster Mass VanillaCytoSport · off the market53 mcg
• Monster Mass Vanilla CremeCytoSportin a blend
• Monster Massive BananaCytoSport67,500 mcg as transcribed, likely a slip
• Monster Massive ChocolateCytoSport67,500 mcg as transcribed, likely a slip
• Monster Massive Cookies 'N CremeCytoSport67,500 mcg as transcribed, likely a slip
• Monster Massive StrawberryCytoSport67,500 mcg as transcribed, likely a slip
• Monster Massive VanillaCytoSport67,500 mcg as transcribed, likely a slip
• Monster Massive VanillaCytoSport Monster Series67,500 mcg as transcribed, likely a slip
• Monster MultiCytoSport100 mcg
• More GreensPurium Health Products · off the marketin a blend
• More Than A Multiple Iron-Free/Vegetarian FormulaAmerican Health75 mcg
• More Than A Multiple Multivitamin For MenAmerican Health75 mcg
• More Than A Multiple Multivitamin For WomenAmerican Health75 mcg
• More Than A Multiple Multivitamin FormulaAmerican Health75 mcg
• More Than A Multiple With Brain EssentialsAmerican Health150 mcg
• More Than A Multiple With Cardio EssentialsAmerican Health150 mcg
• More Than A Multiple With Energy EssentialsAmerican Health150 mcg
• More Than A Multiple With Vision EssentialsAmerican Health150 mcg
• MorningLife Time Fitness · off the market75 mcg
• MorphomultiMN Morphogen Nutrition150 mcg
• Mother & ChildPure Essence152 mcg
• Mother Kare Prenatal MultivitaminNature's Gifts · off the market150 mcg
• Mother to BePure Essence152 mcg
• MRP All Natural Meal-Replacement Shake ChocolatePure Advantage · off the market19 mcg
• MRP All Natural Meal-Replacement Shake VanillaPure Advantage · off the market19 mcg
• MRP Apple Crumb CakeCore Nutritionals44 mcg
• MRP Banana CreamCore Nutritionals43.5 mcg
• MRP Blueberry Crumb CakeCore Nutritionals50 mcg
• MRP Carrot CakeCore Nutritionals50 mcg
• MRP ChocolatePure Advantage19 mcg
• MRP Chocolate Caramel Candy BarCore Nutritionals50 mcg
• MRP Chocolate MilkshakeNutraBio75 mcg
• MRP Cinnamon and Brown SugarCore Nutritionals50 mcg
• MRP Classic VanillaCore Nutritionals43.5 mcg
• MRP Creamy VanillaNutraBio75 mcg
• MRP Double Chocolate Oatmeal CookieCore Nutritionals50 mcg
• MRP Peanut Butter Oatmeal CookieCore Nutritionals50 mcg
• MRP Pumpkin PieCore Nutritionals50 mcg
• MRP Rich ChocolateCore Nutritionals43.5 mcg
• MRP S'MoresCore Nutritionals50 mcg
• MRP SnickerdoodleCore Nutritionals43.5 mcg
• MRP VanillaPure Advantage19 mcg
• MRP Vanilla PoundcakeCore Nutritionals50 mcg
• Mulit-Herb Digestion & Detox SupportNature's Secret · off the market13 mcg
• Mulitvitamin Gummies WomenWell At Walgreens40 mcg
• Mulltivitamin Women 50+Well At Walgreens150 mcg

Where next?

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