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.

CategorySuggested time

Showing 2 ingredients

Exfoliating acidsMorning or evening

Salicylic Acid

An oil-soluble exfoliating acid used in pore-focused routines; type, contact time and frequency matter.

Exfoliating acidsEvening

A small-molecule AHA used for surface exfoliation; home leave-on products and professional peels are different contexts.