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

• Optisource Post Bariatric Surgery Formula CitrusOptisource · off the market37.5 mcg
• Optivite P.M.T.Optimox Corporation · off the market75 mcg
• Optivite P.M.T.Optimox · off the market75 mcg
• Oral ChelateMicroTech Professional Formulations91 mcg
• Orange TriadControlled Labs150 mcg
• Orange Triad + Greens Orange FlavorControlled Labs225 mcg
• Organic All-In-One Decadent ChocolatePurely Inspired30 mcg
• Organic All-In-One French VanillaPurely Inspired20 mcg
• Organic Blue-Green SuperfoodTriquetra Health · off the market2.65 mcg
• Organic Blue-Green SuperfoodTriquetra2.65 mcg
• Organic Complete Multi Mixed Berry FlavorL'il Critters21 mcg
• Organic Daily Multi Mixed Berry FlavorL'il Critters · off the market21 mcg
• Organic GreensPurely Inspired · off the market38 mcg
• Organic Gummy Multivitamin for KidsBurton Nutrition42 mcg
• Organic IodineSunwarrior Be Well225 mcg
• Organic Iodine Liquid Drops UnflavoredMary Ruth’s250 mcg
• Organic Irish MossSprouts Farmers Market1,100 mcg
• Organic KelpNOW450 mcg
• Organic Kelp Powder 1 gNutricost · off the market650 mcg
• Organic Kelp Powder 5 g UnflavoredNutricost Organic3,250 mcg
• Organic Kids Best Multi Mixed Berryvitafusion GOODNESS42 mcg
• Organic Kids MultiHello Bello42 mcg
• Organic Kids Multivitamin & Postbiotics Gummies Mixed Berry & Cherry FlavoredMary Ruth’s40 mcg
• Organic Kids Multivitamin Gummies Mixed Berry & Cherry FlavoredMary Ruth’s40 mcg
• Organic Men's MultiPuritan's Pride150 mcg
• Organic Men's Multi Fresh Strawberry Flavorvitafusion38 mcg
• Organic Multi VitaminWindmill Natural Vitamins · off the market75 mcg
• Organic Multivitamin Gummy for Children 2+Amvilab21 mcg
• Organic Multivitamin Real Fruit GummiesSpring Valley60 mcg
• Organic Plant Protein Chocolate FlavorBluebonnet3.5 mcg
• Organic Plant Protein Vanilla FlavorBluebonnet3.5 mcg
• Organic Prenatal Multi Ripe Raspberryvitafusion · off the market160 mcg
• Organic Prenatal Multi Ripe Raspberry Flavorvitafusion160 mcg
• Organic SpirulinaTriquetra Health8.1 mcg
• Organic Spirulina Tablet FormTriquetra Health5.3 mcg
• Organic SuperveggiesAncient Nutrition75 mcg
• Organic Total NutritionGenesis Today67 mcg
• Organic Vegan Protein Vanilla FlavorOrganic Muscle14 mcg
• Organic VeggieProtein ChocolateBluebonnet Super Earth3.5 mcg
• Organic VeggieProtein Chocolate MochaBluebonnet Super Earth3.5 mcg
• Organic VeggieProtein Natural Original FlavorBluebonnet Super Earth3.3 mcg
• Organic VeggieProtein VanillaBluebonnet Super Earth3.5 mcg
• Organic VeggieProtein Vanilla ChaiBluebonnet Super Earth3.5 mcg
• Organic Whole Food PrenatalAmazon Elements145 mcg
• Organic Women's MultiPuritan's Pride150 mcg
• Organic Women's Multi Wild Cherry Flavorvitafusion37,500 mcg as transcribed, likely a slip
• Organically Bound MineralsSP Standard Process200 mcg
• OrganIQ Eats Chocolate HazelnutGNC Earth Genius · off the market37.5 mcg
• OrganIQ Eats Mixed BerryGNC Earth Genius · off the market37.5 mcg
• OrganIQ Eats VanillaGNC Earth Genius · off the market37.5 mcg

Where next?

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