What it is
Bentonite is a fine clay composed mainly of the swelling mineral montmorillonite, formed from weathered volcanic ash. When dispersed in water it swells and forms a gel-like structure, which makes it useful for thickening, stabilizing emulsions, and keeping particles such as mineral UV filters evenly suspended. It also absorbs oil and helps deliver a smoother, more matte feel in creams and lotions.
Safety & warnings
Bentonite clay is generally well tolerated and widely used in cosmetics with low irritation potential. As an inert mineral powder it is not considered comedogenic. Care in handling the dry powder applies during manufacture, but in finished formulas it is dispersed and stable.
Origin & sourcing
Natural; a mined clay mineral derived from the weathering and alteration of volcanic ash, refined for cosmetic use.
Questions everyone asks
What does bentonite do in a sunscreen?
It thickens and stabilizes the formula and helps keep mineral particles evenly suspended, while also absorbing oil for a smoother finish.
Is bentonite a natural ingredient?
Yes. It is a naturally occurring clay mineral derived from weathered volcanic ash, then refined for cosmetic use.