How to read a cosmetic ingredient list

The direct answer

On an EU cosmetic, look for the heading “Ingredients” followed by standard ingredient names, commonly called INCI names. Ingredients are generally listed in descending order by weight when added to the product. Ingredients present at 1% or less may appear in any order after those above 1%; colourants may be listed after the other ingredients, subject to the applicable rules.

This means the first part of the list usually describes the main formula structure. It does not let you calculate exact percentages, compare performance from order alone or conclude that an unfamiliar name is unsafe.

1. Identify the product and contact pattern

A rinse-off cleanser, leave-on cream, perfume and exfoliant have different intended functions and exposure. Read the directions and warnings before judging individual ingredients. A surfactant that makes sense in a cleanser may not be the central ingredient in a moisturiser.

• Rinse-off: contact time is usually limited by use and rinsing.
• Leave-on: the formula remains on skin and requires a suitable preservation and safety approach.
• Targeted use: eye area, lips or exfoliation may have additional directions or precautions.

2. Read ingredients by role, not by fear

Common roles include solvents or carriers, humectants that help retain water, emollients that change skin feel, surfactants that help cleanse, emulsifiers that keep oil and water phases together, thickeners, preservatives, fragrances, colourants and functional ingredients.

One ingredient can have more than one role. The finished formula, concentration, pH, packaging and interactions matter. “Contains X” is therefore less informative than how X is used in the complete product.

3. Understand the 1% boundary

The 1% rule is often misunderstood. Below that threshold, order can change without implying a meaningful concentration difference. It also means that finding a highlighted ingredient near the end of the list does not by itself prove that the amount is ineffective—or effective. The correct interpretation requires formula and evidence context not normally printed on the consumer label.

4. Find fragrance and allergen information

A fragrance mixture may appear as “parfum” or “aroma”. Certain fragrance allergens must also be listed individually when the applicable conditions and thresholds are met. Individual sensitivity can still occur even when a product is compliant.

“Fragrance-free” and “unscented” are not always identical ideas. Check the actual ingredient list and product definition rather than relying on front-label impression.

5. Know what the label cannot tell you

• Exact percentage of most ingredients
• Supplier grade or complete specification
• Finished-product clinical performance
• All stability, microbiology or safety-assessment details
• Whether a plant-derived material has a lower environmental impact
• Whether the product will suit one particular person

CosIng is useful for names and recognised cosmetic functions, but it is an information database and not proof that any use, product or claim is authorised.

A practical reading sequence

For Elissys and Alpeja products, use the current product package or official current product page as the authoritative formula source. An older retailer page may not reflect a later formula update.