mineral

Iron supplements

Half of the 6,910 iron supplements in the NIH label database that print an amount list 5 mg or less per serving; the middle half list 1.2 mg to 18 mg, and 1 in 29 of the 6,825 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 291 products whose only supplement ingredient is iron list a median of 27 mg, and 25% of them give more than the upper limit.

How much iron do supplements contain?

The median product lists 5 mg per serving. One in ten lists 0.5 mg or less, one in ten 27 mg or more. The amount printed most often is 18 mg (778 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for iron is 18 mg (adults and children 4 and older). The median product gives 28% of it per serving; the 90th percentile 150%.

The adult Tolerable Upper Intake Level is 45 mg a day (total intake from food, water and supplements). At the most servings their labels direct, 234 of the 6,825 products with a plausible amount (3.4%) 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 forms of iron do labels name?

Ferrous fumarate is the form named most often: 1,280 of the 8,696 iron products (15%), ahead of iron bisglycinate (546, 6%) and ferrous gluconate (228, 3%). A product naming two forms counts in both; the table below gives every form.

• Ferrous fumarate
• Iron bisglycinate
• Ferrous gluconate
• Ferrous sulfate
• Carbonyl iron
• Polysaccharide-iron complex

Which products list the most iron?

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).

• Trigelsd-F ForteTrigen Laboratories151 mg
• Trigels-F ForteTrigen Laboratories151 mg
• Ferrex-150Major150 mg
• Ferrex 150 Plus CapsulesBreckenridge150 mg
• Ferrex 150Breckenridge Pharmaceutical150 mg
• FEONYX 1 mg/150 mgAmella Pharma150 mg
• Corvite 150Vertical Pharmaceuticals150 mg
• Corvite FeVertical Pharmaceuticals150 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 6 mg; those entered in 2025, 4 mg.

In which products and brands?

Brands listing it most: Nature's Plus (162), Nature's Way (73), Core Nutritionals (63), Douglas Laboratories (58), Amazing Grass (55), Bronson (50), Sunwarrior (50), Garden of Life (49), Solgar (47), XYMOGEN (45).

Every product listing iron

8,696 products, A to Z by name (page 174 of 174), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• XxEssential Beginnings · off the market28 mg
• XylitolBulkSupplements.com · off the marketno amount
• Xylitol Powder 4 gBulkSupplements.comno amount
• Y.P.D. Support FormulaDouglas Laboratories1.5 mg
• Ya Ya SyrupRag Tag Health · off the marketin a blend
• Yacon SyrupTru Body Wellness · off the marketin a blend
• Yacon SyrupChoice Nutrition Supplements · off the marketin a blend
• Yacon SyrupBIOVEAin a blend
• Yacon SyrupAmazon Therapeuticsin a blend
• Yaeyama ChlorellaSource Naturals4 mg
• Yaeyama Chlorella 200 mgSource Naturals1.8 mg
• Yang EssentialsSun Ten9 mg
• Yeast Free Vegetarian MultiGNLD Nutritionals · off the market18 mg
• Yin EssentialsSun Ten9 mg
• Yogurt & Protein BlueberryAbout Time0.1 mg
• Young AdultCooper Complete18 mg
• Young Athlete Natural ChocolatePhenom Nutrition · off the market1 mg
• Young Men's Multivitamin Plus Healthy SkinRainbow Light Vibrance · off the market5 mg
• Your Daily NutritionCountry Life Realfood Organics0.2 mg
• Your Life Multi Green SouceNature's Bounty15 mg
• Your Life Multi Green SourceNature's Bounty · off the market15 mg
• Your Life Multi PrenatalNature's Bounty · off the market28 mg
• Your Life Multi Prenatal Specialty FormulaNature's Bounty · off the market28 mg
• Yumberry Juice PowderBIOVEA Natural Foods1 mg
• ZEssential Beginnings · off the market27 mg
• Z+Essential Beginnings · off the market18 mg
• Z-BinderOrtho Molecular Products2 mg
• Z-ForceDymatize · off the market1.7 mg
• Zalvit Tabletsnbgs PHARMA13 mg
• Zatean -Pn DHATrigen Laboratories27 mg
• Zatean -Pn PlusTrigen Laboratories28 mg
• Zenith NANO 250 Liquid Kratom ExtractKraken Kratomno amount
• Zero Carb Fat Incinerating Zerotein Serious ChocolateVPX · off the market0.22 mg
• Zero Carb Fat Incinerating Zerotein StrawberryVPX · off the market0.12 mg
• Zero Carb Fat Incinerating Zerotein Vanilla DreamVPX · off the market0.11 mg
• Zero Iron Hi-Potency Multi Vitamin-MineralWonder Laboratoriesno amount
• Zinc Gummies with ElderberryAbsolute Immunityno amount
• ZiphexAyurax13 mg
• Zn-MinLoomis Enzymes2 mg
• Zoo Friends Complete21st Century Zoo Friends9 mg
• Zoo Friends with Iron21st Century Zoo Friends15 mg
• Zow Multi-Vites For Teenage BoysNutrition Now · off the market5 mg
• Zow Multi-Vites For Teenage GirlsNutrition Now · off the market5 mg
• ZuBroth Savory HerbUMZU0.5 mg
• ZuCollagen Chocolate BrownieUMZU2 mg
• Zupa Protein Greenz Banana FlavorXtendlife0.5 mg

Where next?

• Iron capsules
• Iron drops
• Iron gummies
• Iron powder
• Liquid iron
• Vegan iron
• Check an amount of iron
• Labels above the upper limit
• All ingredients