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.
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).
- 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.
| Year | Products | Median per serving |
|---|---|---|
| 2011 | 149 | 150 mcg |
| 2012 | 433 | 150 mcg |
| 2013 | 538 | 150 mcg |
| 2014 | 256 | 150 mcg |
| 2015 | 268 | 150 mcg |
| 2016 | 310 | 150 mcg |
| 2017 | 329 | 150 mcg |
| 2018 | 280 | 120 mcg |
| 2019 | 331 | 150 mcg |
| 2020 | 640 | 150 mcg |
| 2021 | 514 | 104.5 mcg |
| 2022 | 643 | 150 mcg |
| 2023 | 580 | 150 mcg |
| 2024 | 598 | 150 mcg |
| 2025 | 513 | 150 mcg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing iodine by DSLD product type
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 9 of 133), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- Alive! Prenatal Gummies with 50 mg Plant DHANature's Way · off the market290 mcg
- Alive! Prenatal Gummy VitaminsNature's Way · off the market290 mcg
- Alive! Prenatal Multi-Vitamin With Plant DHANature's Way · off the market150 mcg
- Alive! Prenatal Multi-Vitamin with Plant DHA Strawberry FlavoredNature's Way150 mcg
- Alive! Prenatal Multi-Vitamin With Plant DHA Strawberry/Lemon Flavored GummiesNature's Way · off the market150 mcg
- Alive! Prenatal Multivitamin GummyNature's Way290 mcg
- Alive! Protein VanillaNature's Wayin a blend
- Alive! Super Fruits KidsNature's Way48.75 mcg
- Alive! Super Fruits Women'sNature's Way165 mcg
- Alive! Super Fruits Women's 50+Nature's Way165 mcg
- Alive! Super Fruits Women's Complete MultiNature's Way164 mcg
- Alive! Teen Complete Multi for Her Citrus Burst FlavorNature's Way · off the market150 mcg
- Alive! Teen Complete Multi for Her Citrus Burst FlavoredNature's Way150 mcg
- Alive! Teen Complete Multi for HimNature's Way150 mcg
- Alive! Ultra Shake Vanilla FlavoredNature's Way150 mcg
- Alive! Ultra-Shake VanillaNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Max PotencyNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Men's Mulit Max PotencyNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Men's Multi Max PotencyNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Multi-VitaminNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Multi-Vitamin Max PotencyNature's Way · off the market150,000 mcg as transcribed, likely a slip
- Alive! Whole Food Energizer Multivitamin Max PotencyNature's Way · off the market150 mcg
- Alive! Whole Food Energizer No Added IronNature's Way · off the market150 mcg
- Alive! Whole Food Energizer Women's Multi Max PotencyNature's Way · off the market150 mcg
- Alive! Women's 50+Nature's Way150 mcg
- Alive! Women's 50+ Complete Multi-VitaminNature's Way150 mcg
- Alive! Women's 50+ Complete MultivitaminNature's Way150 mcg
- Alive! Women's 50+ Gummy Complete Multivitamins Mixed Berry FlavorNature's Way · off the market150 mcg
- Alive! Women's 50+ Gummy MultivitaminNature's Way · off the market150 mcg
- Alive! Women's 50+ Gummy Multivitamin Mixed Berry FlavorNature's Way · off the market150 mcg
- Alive! Women's 50+ Gummy VitaminsNature's Way150 mcg
- Alive! Women's 50+ Gummy Vitamins Mixed Berry FlavorNature's Way · off the market150 mcg
- Alive! Women's 50+ Multi-VitaminNature's Way · off the market150 mcg
- Alive! Women's 50+ Multivitamin GummyNature's Way150 mcg
- Alive! Women's 50+ Multivitamin Gummy Mixed Berry FlavoredNature's Way150 mcg
- Alive! Women's 50+ Premium Gummies MultivitaminNature's Way · off the market150 mcg
- Alive! Women's 50+ Premium Gummy MultivitaminNature's Way150 mcg
- Alive! Women's 50+ Ultra MultivitaminNature's Way150 mcg
- Alive! Women's 50+ Ultra Potency Complete MultivitaminNature's Way · off the market150 mcg
- Alive! Women's Complete MultivitaminNature's Way150 mcg
- Alive! Women's EnergyNature's Way150 mcg
- Alive! Women's Energy Complete MultivitaminNature's Way150 mcg
- Alive! Women's Gummy MultivitaminNature's Way · off the market150 mcg
- Alive! Women's Gummy Multivitamin Mixed BerryNature's Way · off the market150 mcg
- Alive! Women's Gummy Multivitamin Mixed Berry FlavorNature's Way150 mcg
- Alive! Women's Gummy Multivitamin Mixed Berry FlavoredNature's Way150 mcg
- Alive! Women's Gummy Multivitamin Zero Sugar Strawberry FlavoredNature's Way45 mcg
- Alive! Women's Gummy VitaminsNature's Way150 mcg
- Alive! Women's Gummy Vitamins Mixed Berry FlavorNature's Way · off the market150,000 mcg as transcribed, likely a slip
- Alive! Women's MultivitaminNature's Way · off the market150 mcg