Ingredient
Magnesium Sulfate
Epsom Salt
What it is
An inorganic mineral salt (magnesium sulfate, commonly known as Epsom salt) used in cosmetic formulas as an electrolyte that helps set the viscosity and stability of emulsions.
How it works
Provides ionic strength in the water phase that helps thicken and stabilize silicone- or polymer-based emulsion systems, which is especially useful for keeping mineral UV filters evenly suspended.
What it does
Emulsion stabiliser
Viscosity controlling
Concerns to know
-
Well tolerated
No significant safety concern is reported for this ingredient as used in cosmetics.