Iron price per mg — cheapest first

The iron figure on a label is elemental iron, not the weight of the compound. Ferrous fumarate is about 33% iron by weight, so 200mg of ferrous fumarate is declared as roughly 66mg of iron. The price per mg on this page is calculated on elemental iron regardless of form.

Price per mg ranges from a low of $0.000698/mg to a median of $0.4270/mg. The median is 611× the lowest, so the cost of the same 1mg of Iron spreads over a hundredfold across products. That means the per-unit gap between products near the top and the middle of the ranking is that large.

Price per mg is computed for 2,426 of the 2,653 listed (91%). The rest, missing a sale price or amount, are placed at the bottom of the ranking and excluded from the statistics above.

The Iron amount per serving ranges from 0.01mg to 150mg, with a median of 2.7mg. The maximum is 56× the median, so high-dose singles and blends listing a small Iron amount sit in the same table.

The products in this list come from 493 brands, and the sort order is determined solely by price per mg.

Products classified by label form notation number 594 (22% of the total), and the most frequently noted form is Iron bisglycinate with 270. Products with no form notation, or whose notation does not match the classification rules, do not appear on the per-form pages, so the per-form product counts sum to less than the total product count above.

Iron is often formulated with vitamin C or folate, so blends end up in this list. For a blend, the price per mg charges the entire product price to iron alone.