Dicalcium Phosphate

Dicalcium phosphate is an inorganic salt derived from calcium and phosphate. It appears in skincare products primarily as a physical exfoliant—a fine, solid particle that works mechanically to remove dead skin cells and surface debris when rubbed gently across the skin.The ingredient functions as an abrasive and bulking agent. It is inert, meaning it does not dissolve or chemically alter on contact with skin, but remains as a solid particle until rinsed away. This makes it suitable for formulations where a consistent, mild exfoliating texture is desired.

Dicalcium phosphate works as a physical exfoliant through mechanical abrasion. When suspended in a formula and applied to damp skin with gentle circular motions, the fine particles create friction that dislodges loose dead skin cells and surface impurities.Because it is an inert mineral, it does not absorb into the skin or undergo chemical transformation. It simply remains on the surface until rinsed away with water, carrying away the exfoliated material with it.

Use dicalcium phosphate-containing products on damp skin with light, circular motions. Avoid over-scrubbing, particularly on sensitive or compromised skin. Most formulations are suited to 2–3 times weekly use; follow individual product guidance. Always follow with a hydrating toner or moisturiser to support the skin barrier after exfoliation.

Dicalcium phosphate is generally well-tolerated as a topical abrasive. Avoid contact with eyes. Those with sensitive skin, active inflammation, or compromised skin barrier should patch-test first or use sparingly, as physical exfoliants can cause irritation if applied too vigorously.