How to Read Skincare Labels: The EWG Skin Deep Guide (2026)

A skincare ingredient list is designed to be technically accurate, not readable. The regulatory requirement is that every ingredient be listed by its INCI (International Nomenclature of Cosmetic Ingredients) name, in descending order of concentration down to 1%. What results is a list of Latin botanical names and systematic chemical names that looks impenetrable without some reference material.

This guide decodes the system. Understanding a label well enough to make an informed purchase doesn’t require a chemistry degree—it requires knowing where each ingredient category lives on the list and which specific names to flag.

How the Ingredient List Is Structured

Rule 1: Concentration order. Ingredients are listed highest-to-lowest concentration, down to 1%. Below 1%, they can be listed in any order. This means the first 5-6 ingredients are doing most of the work; ingredients buried at the bottom are at trace concentrations.

Rule 2: Water is usually first. “Aqua” or “Water” leads most skincare formulas because most products are water-based emulsions. A serum or cream that lists water first is not unusual or inferior—water is the solvent that carries active ingredients.

Rule 3: The 1% threshold matters. When you see “fragrance” or a concerning ingredient near the bottom of a long list, it’s likely below 1% concentration. That may or may not be enough to be problematic, depending on the ingredient—some sensitizers cause reactions even at very low concentrations.

Rule 4: Active ingredients may be listed separately. For over-the-counter drug products (including sunscreen), active ingredients are listed under a separate “Active Ingredients” header before the main ingredient list. Everything else is in the inactive ingredients list. Zinc oxide in a sunscreen is an active ingredient; the skin moisturizers and emollients are in the inactive section.

What Common INCI Names Actually Mean

Before the concern list—some reassuring translations:

The “alcohol” confusion is worth addressing: cetearyl alcohol, cetyl alcohol, stearyl alcohol are fatty alcohols—they’re emollients and emulsifiers that soften skin. They’re not the drying, astringent type of alcohol (ethanol, alcohol denat., isopropyl alcohol) that disrupts the skin barrier.

The Watch List: Ingredients Worth Flagging

These are the INCI names for the ingredients most commonly flagged in clean beauty discussions, with the concern and the score you’ll typically see on EWG Skin Deep:

Synthetic fragrance entry:

• Fragrance, Parfum — EWG scores fragrance as 8 (high concern) because of undisclosed ingredients. Even at trace amounts, it’s the most common contact allergen in cosmetics.

Parabens:

• Methylparaben, Ethylparaben, Propylparaben, Butylparaben, Isobutylparaben — EWG scores 4-7 depending on the specific paraben. Endocrine disruption concern.

Chemical UV filters (in sunscreen):

• Benzophenone-3 (same as oxybenzone) — EWG score 8. Endocrine disruptor, reef-toxic.
• Ethylhexyl Methoxycinnamate (same as octinoxate) — EWG score 6. Reef-toxic.
• Homosalate — EWG score 4.
• Octisalate — EWG score 3.

Formaldehyde-releasing preservatives:

• DMDM Hydantoin — EWG score 7
• Imidazolidinyl Urea — EWG score 6
• Diazolidinyl Urea — EWG score 7
• Quaternium-15 — EWG score 8
• 2-Bromo-2-Nitropropane-1,3-Diol (Bronopol) — EWG score 7

PEG compounds (higher molecular weight):

• PEG-100 Stearate, PEG-20, PEG-40 — moderate concern (potential ethylene oxide and 1,4-dioxane contamination from manufacturing). Not acutely toxic but EWG flags the contamination risk.

Coal tar dyes (in makeup):

• FD&C Blue No. 1, D&C Red No. 7, and similar color codes — potential carcinogens. EWG scores range from 3-9 depending on the specific dye.

Heavy metals (in makeup):

• Conventional makeup sometimes contains trace heavy metals from mineral pigments. EWG’s cosmetics screening flags products that have tested positive for arsenic, lead, or mercury.

How to Use EWG Skin Deep

Step 1: Go to ewg.org/skindeep

Step 2: Search the product name, brand, or UPC code. If the product is in the database, you’ll see an overall score (1-10) and a breakdown of which ingredients are driving concerns.

Step 3: For products not in the database, search individual ingredients by INCI name. You can build a manual picture of a formula’s overall concern level.

Step 4: Click on any ingredient to see the concern categories: cancer, developmental & reproductive toxicity, allergies & immunotoxicity, use restrictions. The concern categories are sometimes more informative than the number alone—a score of 4 for “allergy concern” is different from a score of 4 for “cancer concern.”

What EWG doesn’t tell you: Whether a product works. Whether a formula is well-formulated for its stated purpose. Whether the concentration of an active ingredient is sufficient. EWG tells you about safety; efficacy is a separate question.

Brand Claims vs. Ingredient Lists

A practical exercise: pick any skincare product with clean beauty marketing. Read the front-of-pack claims (“natural,” “clean,” “botanical,” “free from parabens, SLS, and phthalates”). Then look up the product on EWG Skin Deep.

The score you find will tell you whether the front-of-pack claims correlate with the actual ingredient list. Common findings:

• “Free from parabens, SLS, and phthalates” product that scores 7 because of synthetic fragrance and formaldehyde-releasing preservatives
• “100% natural” product that scores 5-6 because of essential oils at sensitizing concentrations
• “Clean beauty” product from a major retailer that scores 8 because of oxybenzone in the sunscreen
• Conventional drugstore product that scores 1-2 because it’s a simple, fragrance-free formula

The label tells you what the brand wants you to think. The ingredient list tells you what’s actually in the bottle.

The 60-Second Product Check

For any product you’re considering buying:

1. Open ewg.org/skindeep on your phone
2. Search the product name
3. Check the overall score and the top concern ingredients
4. If the product isn’t listed, search the first 5-6 ingredients by INCI name

For products scoring 1-2: buy with confidence. For products scoring 3-4: read the concern categories—if the flags are allergy concerns from essential oils and you’re not sensitive, you may be fine. For products scoring 5-6: review the specific flagged ingredients against your personal concern priorities. For products scoring 7+: there are typically better alternatives.

This takes 60 seconds. It’s the most useful single habit in clean beauty.

→ Back to the full cluster: The Complete Clean Beauty Guide (2026)