How to read a skincare ingredient list (INCI) — general information

Educational information only — not a skin assessment, treatment, diagnosis, product recommendation, or product service.

Turn over almost any cosmetic product and you'll find a dense block of unfamiliar names. That block follows rules — and once you know a few of them, the label becomes much easier to read. This article is general label-literacy information about how cosmetic ingredient lists work in the United States. It doesn't evaluate products or ingredients, and it isn't advice about what anyone should use.

What those names are

Cosmetic ingredient lists use standardized naming — commonly called INCI (International Nomenclature of Cosmetic Ingredients) — so the same ingredient appears under the same name across different brands and countries. A few patterns show up constantly:

• Water usually leads the list, sometimes written as "Aqua."
• Botanicals appear as Latin binomials, like Camellia Sinensis Leaf Extract (green tea).
• "Fragrance" or "Parfum" can stand in for a blend of scent components that aren't itemized individually.
• Many silicones end in "-cone" or "-siloxane," and common humectants (water-binding ingredients) such as glycerin often sit high on water-based formulas.

The ordering rule

US cosmetic labeling regulations require ingredients to be declared in descending order of predominance. Ingredients present at one percent or less may be listed in any order after the more predominant ones, and color additives may be grouped at the end. Two practical takeaways: position near the top of the list says something about relative amount, and position near the bottom says very little. The list never shows exact percentages.

Cosmetic list vs. Drug Facts panel

Some products on the same shelf are cosmetics, some are over-the-counter (OTC) drug products, and some are both. A sunscreen is a familiar example: in the US it carries a Drug Facts panel with an "Active ingredients" section, separate from any cosmetic ingredient list. Terms like SPF, broad spectrum, and water resistance are defined on that panel — so for sun-protection use, the product's own Drug Facts/label is the reference to follow.

What a list can — and can't — tell you

An ingredient list can tell you whether a specific name is present, give a rough sense of relative amounts near the top, and show whether the product also carries a Drug Facts panel. It can't tell you exact concentrations, how a finished formula will feel in use, or how any individual will respond to it. If you have a known sensitivity or questions about a specific product, the brand's own label and directions — and a dermatologist or other licensed professional — are the right places to take them.