Diatomaceous Earth

Diatomaceous earth is a naturally occurring silica-rich powder formed from the fossilised shells of diatoms, single-celled algae. These shells have a porous, microscopic structure with a high surface area, making the material useful in skincare as a physical exfoliant and absorbent.In cosmetic formulations, diatomaceous earth functions primarily as an abrasive agent, helping to gently remove dead skin cells from the surface. It also serves bulking and anti-caking roles in powder formulations, contributing texture and helping other ingredients remain stable and free-flowing.

Diatomaceous earth works mechanically rather than chemically. When applied to skin, its irregular crystalline structure physically removes the outermost layer of dead skin cells through gentle abrasion. This surface-level exfoliation can help refine skin texture and allow better penetration of other skincare ingredients.Its absorbent properties come from the porous nature of the diatom shells, which can hold water and oils within their microscopic cavities. This makes it useful in formulations intended to mattify or control excess sebum.

Use diatomaceous earth products 1–2 times per week as a gentle exfoliant, depending on your skin's tolerance. Wet your skin before applying, use light circular motions, and rinse thoroughly with lukewarm water. If combining with other actives, allow time between applications to avoid over-exfoliation. Always follow the product instructions, as formulations vary.

Diatomaceous earth is not irritating to skin or eyes when used topically in cosmetic products. However, inhalation of the powder should be avoided, so apply wet or in a controlled manner to minimise dust.