Absorbent

Fuller's Earth

Reviewed by Daisy · Last updated 18 Aug 2026

Mineral substance that is similar to kaolin (a clay)

What Is Fuller's Earth?

Mineral substance that is similar to kaolin (a clay). Composed mainly of alumina, silica, iron oxides, lime, magnesia, and water, it is used as an absorbent and thickening agent in cosmetics.

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Part of a family

Fuller's Earth is a variant of Solum Fullonum, the form you will most often see on an ingredients list.

A naturally-derived mineral that absorbs oil and helps control texture in formulations

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