Free tool

Do these clash?

Pick two or three ingredients. We will tell you if they clash, and why.

Pick two ingredients to see how they get along.

General guidance, not medical advice. When in doubt, introduce one product at a time.

This checks whether your ingredients clash. To check a whole product for pore-clogging ingredients, use the pore checker.

Checking a whole label?

This checks a pair. The Ingredient Decoder reads an entire product at once, ingredient by ingredient.

Answer a few questions and get a simple routine built for your skin, with nothing that fights itself.

Every verdict here comes from the same rules. How we score →