Ingredient Library

Skincare Ingredient Library

Each page covers common uses, timing, formulation notes, precautions and published pairings.

The English edition contains 14 source-checked and editorially reviewed Ingredients.

Showing 2 ingredients

Vitamin A derivativesEvening

Retinol

A common non-prescription vitamin A derivative that is usually introduced gradually in the evening.

Vitamin A derivativesEvening

Retinal

A vitamin A derivative that is chemically distinct from Retinol and should be introduced at low frequency in the evening.