How to Read a Skincare Ingredients List
Ingredient lists become much easier to use once you know what the order, names and repeated ingredient families actually mean.
What INCI means
Cosmetic ingredient lists generally use standardised ingredient names so the same substance can be recognised across products and markets. You may see this described as INCI, short for International Nomenclature of Cosmetic Ingredients.
In Great Britain, cosmetics supplied to consumers must provide an ingredient list. This can help people check known allergies and compare formulas, but precautions, product purpose and directions matter too.
How ingredient order works
Ingredients are generally listed in descending order by weight until the lower concentration part of the formula is reached. Water, common solvents, emollients or humectants therefore often appear near the beginning.
Do not use position as an exact percentage calculator. Two neighbouring ingredients can still be present at different levels, and an ingredient used at a low level can still have an important role.
Recognise ingredient families
Glycerin and hyaluronic acid derivatives are examples used to support water retention in the upper skin layers.
Oils, esters and other emollients can soften the surface and change how a formula spreads.
Ingredients such as petrolatum can help reduce water loss from the surface.
Retinoids, exfoliating acids and other targeted ingredients need the context of the whole formula.
For more context, read our skincare actives guide. If several actives appear across your routine, the Ingredient Compatibility Checker can help organise them.
Fragrance, allergens and percentages
Fragrance may appear as parfum or aroma, while certain fragrance allergens can also appear separately. If you have a known allergy, the full ingredient list matters more than a front label claim.
A stated concentration can be useful when two products use the same active ingredient. It still does not make the formulas equivalent. pH, stability, delivery system and supporting ingredients can all change how a product behaves.
Start with a question
Ingredient lists are most useful when you know what you are checking. That might be a known allergen, the main moisturising ingredients, a particular active or overlap between two products.
If the whole routine feels complicated, start with the Routine Builder and then use the ingredient list to understand each step.