Ingredient
Cyclopentasiloxane
Worth watching
Some people do better without it. Worth swapping when you can.
What it is
A light silicone that flashes off the skin.
Why it’s used
Slip, spread, a dry-touch finish.
What to know
Questions about persistence in the environment. Skin usually tolerates it.
Who should skip
Anyone avoiding silicones by preference.
A gentler swap
Plant oils, a mineral veil.
You’ll see it in
Foundation, sunscreen, hair serum.