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

• Multivitamin/Multimineral Adults Under 50up&up150 mcg
• Multivitamin/Multimineral TabletEckson Labs220 mcg
• Multivitamina Para Hombres A Base De AlimentosVidasencia · off the market25 mcg
• Multivitamina Para MujeresVidasencia · off the market100 mcg
• Multivitamins GummiesHavasu Nutrition80 mcg
• MultiviteDouglas Laboratories100 mcg
• MultiviteEveryday Health150 mcg
• MultiVites Hair, Skin & Nails Natural Mixed Berry FlavorNutrition Now · off the market120 mcg
• MultiVites Men'sNutrition Now · off the market38 mcg
• MultiVites Women'sNutrition Now · off the market38 mcg
• MultiWomen'sVinco150 mcg
• Multminerals Plus BoronBluebonnet · off the market150 mcg
• Mum-2-BeHigher Nature45 mcg
• Muscle & Weight Gainer ChocolatePrecision Engineeredin a blend
• Muscle & Weight Gainer VanillaPrecision Engineeredin a blend
• Muscle Building Milk Shake Elite Series Decadent ChocolateSix Star Pro Nutrition53 mcg
• Muscle Building Milk Shake Elite Series Vanilla CreamSix Star Pro Nutrition53 mcg
• Muscle Infusion Black Chocolate MonsterNutrex Research75 mcg
• Muscle Infusion Black Cookie MadnessNutrex Research75 mcg
• Muscle Infusion Black Vanilla BeastNutrex Research · off the market75 mcg
• Muscle Infusion Black Vanilla VillainNutrex Research75 mcg
• Muscle Infusion ChocolateNutrex Research52 mcg
• Muscle Infusion Chocolate Banana CrunchNutrex Research52 mcg
• Muscle Infusion Chocolate Peanut Butter CrunchNutrex Research52 mcg
• Muscle Infusion VanillaNutrex Research52 mcg
• Muscle Mass Gainer ChocolateLabradain a blend
• Muscle Matrix MRP Banana CreamNutraBio75 mcg
• Muscle Matrix MRP Chocolate MilkshakeNutraBio · off the market75 mcg
• Muscle Matrix MRP Creamy VanillaNutraBio · off the market75 mcg
• Muscle Matrix MRP Strawberry SmoothieNutraBio75 mcg
• Muscle Matrix MRP Women's Formula Banana CreamNutraBio75 mcg
• Muscle Matrix MRP Women's Formula Chocolate MilkshakeNutraBio75 mcg
• Muscle Matrix MRP Women's Formula Creamy VanillaNutraBio75 mcg
• Muscle Matrix MRP Women's Formula Strawberry SmoothieNutraBio75 mcg
• Muscle Milk Banana Creme ShakeChampBev53 mcg
• Muscle Milk Brownie BatterCytoSport53 mcg
• Muscle Milk ChocolateCytoSport53 mcg
• Muscle Milk Chocolate Milk ShakeChampBev53 mcg
• Muscle Milk Collegiate Chocolate Milk ShakeCytoSport38 mcg
• Muscle Milk Collegiate Vanilla Creme ShakeCytoSport38 mcg
• Muscle Milk Cookies 'N' Creme ShakeChampBev35 mcg
• Muscle Milk Light Banana CremeCytoSport53 mcg
• Muscle Milk Light Cake BatterCytoSport53 mcg
• Muscle Milk Light Chocolate MilkCytoSport53 mcg
• Muscle Milk Light Peanut Butter ChocolateCytoSport53 mcg
• Muscle Milk Light Vanilla CremeCytoSport53 mcg
• Muscle Milk Orange CremeCytoSportin a blend
• Muscle Milk Pro Series Intense VanillaMuscle Milkin a blend
• Muscle Milk Pro Series Knockout ChocolateMuscle Milk30 mcg
• Muscle Milk Strawberry BananaCytoSportin a blend

Where next?

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