A form of iron

Polysaccharide-iron complex supplements

38 iron products in the NIH label database list iron as polysaccharide-iron complex (under 1% of the 8,696 iron products); their median is 29 mg of iron per serving, against 5 mg across all iron products (DSLD version 9.4.0, January 2026).

How does polysaccharide-iron complex compare with the other forms?

The median amount of iron per serving in products naming each form; the count in brackets. The amount is the iron the label gives, as printed (the Supplement Facts row normally states the element; a row named as the compound usually gives the compound's weight and is left out of these figures).

Median iron per serving by form

Iron by formFerrous fumarate18 mg (1,280)Iron bisglycinate18 mg (546)Ferrous gluconate9 mg (228)Ferrous sulfate15 mg (186)Carbonyl iron24 mg (164)Polysaccharide-iron complex29 mg (38)
Iron by formFerrous fumarate18 mg (1,280)Iron bisglycinate18 mg (546)Ferrous gluconate9 mg (228)Ferrous sulfate15 mg (186)Carbonyl iron24 mg (164)Polysaccharide-iron complex29 mg (38)
Iron by formFerrous fumarate18 mg (1,280)Iron bisglycinate18 mg (546)Ferrous gluconate9 mg (228)Ferrous sulfate15 mg (186)Carbonyl iron24 mg (164)Polysaccharide-iron complex29 mg (38)
Iron by formFerrous fumarate18 mg (1,280)Iron bisglycinate18 mg (546)Ferrous gluconate9 mg (228)Ferrous sulfate15 mg (186)Carbonyl iron24 mg (164)Polysaccharide-iron complex29 mg (38)
Iron by formFerrous fumarate18 mg (1,280)Iron bisglycinate18 mg (546)Ferrous gluconate9 mg (228)Ferrous sulfate15 mg (186)Carbonyl iron24 mg (164)Polysaccharide-iron complex29 mg (38)

Source: Supplement Facts rows and their forms, NIH ODS Dietary Supplement Label Database version 9.4.0, current labels.

Products
3834 on the market
Median iron per serving
29 mgall iron products: 5 mg
Share of iron products
under 1%38 of 8,696

Is the amount the iron or the whole polysaccharide-iron complex?

A Supplement Facts row normally states the iron itself (a row like "Iron (as polysaccharide-iron complex)"); a row named as the compound (a row like "Polysaccharide-iron complex") usually states the compound's weight, which includes what the iron is bound to and is larger than the iron it supplies. The front of a bottle may print either. Of the 38 products here, 38 give the iron in its own row.

The adult Tolerable Upper Intake Level for iron is 45 mg a day; it covers total intake from food, water and supplements. At the most servings their labels direct, 14 of the 38 polysaccharide-iron complex products with a plausible amount (36.8%) give more than that.

Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; upper limit: Institute of Medicine Dietary Reference Intakes (2011) (what counts as plausible).

What else do these products contain?

Ingredients most often listed alongside it, with the median amount in these products and in all products
IngredientShare of these productsMedian hereMedian, all products
Vitamin C66% 60 mg100 mg
Vitamin B1263% 12 mcg36 mcg
Niacin61% 15 mg20 mg
Riboflavin61% 1.8 mg4 mg
Thiamin61% 1.6 mg5 mg
Vitamin B661% 5 mg6 mg
Folate58% 1,000 mcg400 mcg
Magnesium50% 20 mg86 mg
Zinc50% 18.2 mg11 mg
Vitamin D47% 15.25 mcg15 mcg

Which products are they?

All 38, ordered by the amount of iron per serving, largest first; an amount that looks like a slip or a compound's weight comes last, marked.

Source: NIH ODS Dietary Supplement Label Database version 9.4.0; the form each label names for its row. Daily Values: the FDA's Daily Value page.

Which brands make them?

Everett Laboratories (5), NovaFerrum Pediatric Drops (5), Exeltis USA (5), NovaFerrum (5), Trigen Laboratories (4), Breckenridge Pharmaceutical (2), US Pharmaceutical Corporation (2), PruGen Pharmaceuticals (2), Wellements (1), Major (1).

Where next?