The INCI list is where brands either earn your trust or quietly lose it.
INCI — International Nomenclature of Cosmetic Ingredients — is the standardised list of ingredients on every skincare product sold in Europe, in descending order by concentration. The first five ingredients make up the bulk of the formula. Everything after 1% can appear in any order the brand chooses. Once you understand the system, you can read any skincare label with confidence.
The Basics: How INCI Works
INCI was established in the 1970s as a standardised naming system for cosmetic ingredients, and it’s now mandatory across the EU, UK, and most major markets. Every ingredient must be listed using its INCI name — a combination of Latin botanical names, chemical nomenclature, and common names — in descending order of weight in the formula.
The practical implications:
- Ingredients listed first are present in the highest concentrations. In most conventional moisturisers, “Aqua” (water) appears first, often representing 70–80% of the formula.
- Ingredients listed after 1% can appear in any order. This is a EU regulation exception that brands sometimes exploit — a rare, expensive botanical can appear near the top of the list at 0.5%, legally, while something more abundant appears further down.
- The list must be complete. No ingredients can be omitted, though some fragrance components may be hidden under the collective term “Parfum”.
The Key Terms to Know
Aqua / Water: In most conventional skincare, water is the first and most abundant ingredient. Water is an inert solvent — it carries other ingredients and contributes to texture. In itself, it does nothing for the skin. When a formula is water-free (anhydrous), every ingredient in it is doing active work. This is one reason concentrated serums and face oils often outperform water-heavy moisturisers per unit of active ingredient.
Parfum / Fragrance: “Parfum” is a single INCI term that can represent dozens or even hundreds of individual synthetic chemicals, none of which need to be individually disclosed. This includes known contact allergens, synthetic musks that persist in the environment, and possible endocrine-disrupting compounds. The American Academy of Dermatology identifies synthetic fragrance as the most common cause of allergic contact dermatitis from cosmetics. A product listed as “fragrance-free” should not contain Parfum on the INCI list — this is different from “unscented,” which may contain masking fragrances.
Phenoxyethanol / Methylparaben / Ethylparaben / Propylparaben: Preservatives. Necessary in water-based formulas to prevent bacterial and fungal growth, but a source of sensitisation for some individuals. COSMOS certification prohibits certain preservatives while permitting others. If you’re prone to contact reactions, look for products with short preservative lists or anhydrous (water-free) formulas that require fewer preservatives.
Dimethicone / Cyclopentasiloxane / Cyclomethicone: Silicones. These create the smooth, “silky” texture associated with premium products. They are not harmful or absorbed by the skin, but they are also not beneficial to skin function — they sit on the surface, create a cosmetic effect, and wash off. Their presence high on the INCI list suggests a formula prioritising texture over efficacy.
Butylene Glycol / Glycerin / Propylene Glycol: Humectants. These draw moisture from the environment into the skin. Glycerin in particular is one of the most well-studied and skin-compatible humectants available. Their presence early in the INCI list is generally a positive sign in a moisturising formula.
Cetearyl Alcohol / Stearic Acid / Palmitic Acid: Fatty alcohols and acids. Despite the word “alcohol,” these are not drying — they are derived from plant or animal fats and function as emollients and stabilisers. Not to be confused with ethanol (SD alcohol, denatured alcohol), which is drying and barrier-disruptive at high concentrations.
Reading a Nordic Skincare INCI List
When you read the INCI list of a COSMOS-certified product from our range, several things will be immediately different from conventional skincare:
- No “Parfum” (or if present, replaced by individual natural aroma compounds at low concentration)
- No mineral oil, petrolatum, or dimethicone near the top of the list
- Botanical names appearing high in the list — Betula alba juice (birch sap), Hippophaë rhamnoides (sea buckthorn), Rubus chamaemorus (cloudberry) — at concentrations that indicate they’re doing meaningful work
- Shorter overall lists, suggesting higher concentration per active ingredient
For example, a formula that lists Betula alba juice (birch sap) as its second ingredient, after only a plant emulsifier, is telling you that birch sap is the primary carrier — replacing the water base with a bioactive humectant base. That’s a material formulation decision, not a marketing one. For more on what these ingredients actually do, see Three Nordic Ingredients Worth Knowing.
Common INCI Tricks Brands Use
The “pixie dusting” technique: Including a high-value ingredient at a concentration that’s barely above zero — typically 0.001–0.01% — to justify listing it on the front of the pack. Common examples include hyaluronic acid, retinol, and expensive botanical extracts appearing at the end of long ingredient lists. At these concentrations, they have no measurable effect on the skin.
Natural-sounding synthetic names: Some synthetic compounds have INCI names that sound botanical. “Sodium Cocoate” sounds like coconut, and it is derived from coconut — but it’s a saponified soap that can be harsh on the skin’s acid mantle. INCI names are neutral descriptors, not endorsements.
Splitting ingredients to obscure order: A brand might use three different forms of the same preservative — each appearing further down the list than a single combined version would — to make the preservative load look smaller than it is.
A Practical Checklist for Reading Any Skincare Label
When evaluating a new product, work through this sequence:
- What are the first five ingredients? These are the formula’s foundation. Are they doing meaningful work, or mostly water and thickeners?
- Is “Parfum” on the list? If so, is there a reason you want fragrance in this product?
- Where does the key active ingredient appear? If the hero ingredient (hyaluronic acid, vitamin C, sea buckthorn) appears in position 15 or lower, it’s likely at trace concentration.
- Is the list short? Under 15 ingredients generally means less scope for fillers and sensitisers.
- Is there third-party certification? COSMOS, ECOCERT, NaTrue — any of these indicate that the ingredient list has been independently audited.
For related reading on what makes skincare actually work for Irish conditions, see Why Your Moisturiser Might Be Working Against Your Skin and Your Skin Barrier: The Thing Worth Protecting.
Frequently Asked Questions
What does INCI stand for and who controls it?
INCI stands for International Nomenclature of Cosmetic Ingredients. It’s administered by the Personal Care Products Council (PCPC) in collaboration with the EU and other regulatory bodies. The INCI names are standardised globally, which is why the same ingredient uses the same name on a Finnish product as on an American one.
Is “natural” or “organic” on a label meaningful without certification?
No — these terms are completely unregulated in the EU and UK cosmetics market. A brand can call a product “natural” or “organic” without using a single certified organic ingredient. The only meaningful indicator is third-party certification — COSMOS, ECOCERT, or NaTrue — which requires independent audit of the ingredient list and supply chain.
How do I know if a botanical is at a meaningful concentration?
As a rough guide: if a botanical extract appears in the top 5–6 ingredients, it’s likely at a therapeutically relevant concentration. If it appears in the bottom half of a 20-ingredient list, it’s probably at trace levels (below 0.1%). Some brands publish their active concentrations voluntarily — this is a sign of formulation confidence and transparency.
What’s the difference between “fragrance-free” and “unscented”?
“Fragrance-free” means no fragrant compounds of any kind are present. “Unscented” typically means masking fragrances have been used to neutralise the natural smell of the formula ingredients — the product may still contain synthetic fragrance compounds. For sensitive skin, fragrance-free is the meaningfully safer choice.
Do I need to know chemistry to read a skincare ingredient list?
No — a working knowledge of 10–15 key INCI terms gives you the ability to evaluate most products. The checklist above (position of actives, presence of Parfum, list length, certification) covers the majority of what you need to make an informed choice. Apps like INCI Decoder and EWG’s Skin Deep database can also help decode unfamiliar names.