FERROUS SULFATE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

FERROUS SULFATE

Iron Sulfate

Safety grade: A

Ferrous sulfate is an iron-containing mineral compound that has been used for centuries in skincare. It's the same type of iron found in iron supplements, but formulated for topical use on skin.

As an astringent, ferrous sulfate helps tighten and tone the skin by causing temporary contraction of skin tissues, which can reduce the appearance of pores and create a more refined complexion.

Graded using: COSING.

Last verified: May 26, 2026