How to Read Skincare Ingredient Labels | Dr. Liia
By Dr. Liia Ramachandra, PharmD, PhD — pharmacist, formulator and founder of EpiLynx. 7 min read.
You’ve become a food label expert — you can spot hidden gluten, cross-contamination risks, and your specific allergen names without missing a beat. But skincare labels? They’re a different language entirely. Latin botanical names, chemical synonyms, undisclosed fragrance blends. As a pharmacist who formulates for this exact community, here is everything you need to decode any product before it touches your skin.
The basics: how skincare ingredients are listed
INCI naming — the universal cosmetic language
Skincare ingredients in the US are listed using INCI (International Nomenclature of Cosmetic Ingredients), a globally standardised naming system. This is why your moisturiser lists "Helianthus Annuus Seed Oil" instead of "sunflower oil," or "Butyrospermum Parkii" instead of "shea butter." The Latin names can be intimidating, but once you know the system every label becomes readable.
Descending concentration order
Ingredients are listed from highest to lowest concentration. The first is present in the largest amount — usually water, listed as "Aqua." This ordering applies to everything present above 1%.
Important exception: ingredients at 1% or less can be listed in any order after the higher-concentration ones. Fragrance, preservatives, colourants and many actives present in tiny amounts can appear anywhere in the bottom portion of the list — not necessarily at the very end.
The cosmetic allergen labelling gap
Here is the most important difference between food and skincare labels for our community: the Food Allergen Labeling and Consumer Protection Act applies to food, not to cosmetics.
Food manufacturers must clearly declare wheat, peanuts, tree nuts, soy, milk, eggs, fish, shellfish and sesame in plain language. Cosmetic manufacturers are not required to. They can use "hydrolyzed Triticum vulgare protein" instead of "wheat protein," or "Prunus amygdalus" instead of "almond oil." There is no requirement to flag any of these as allergens.
That gap is why ingredient literacy is a survival skill for the celiac disease and food allergy community rather than optional reading. If you would rather not do the audit every time you shop, our Complete Glow Ritual 3-Step Set is an entire routine that has already been through it — one ingredient list to check instead of three.
The master allergen decoder: INCI names to know
Gluten-containing ingredients (critical for celiac disease)
| INCI name on label | Plain English | Common in |
|---|---|---|
| Triticum Vulgare Germ Oil / Extract / Starch | Wheat | Moisturisers, serums, body creams |
| Hydrolyzed Wheat Protein / Wheat Amino Acids | Wheat | Mascaras, hair products, serums |
| Tocopherol / Tocopheryl Acetate | Often wheat germ — source not always specified | Very widespread: serums, moisturisers, SPF |
| Hordeum Vulgare Extract / Seed Extract | Barley | Anti-ageing serums, soothing products |
| Avena Sativa Kernel Flour / Extract / Oil | Oat — safe if certified gluten-free, otherwise a cross-contamination risk | Baby products, eczema creams, "sensitive" lines |
| Secale Cereale Seed Extract | Rye | Some botanical skincare |
| Malt Extract / Hordeum Distichon Extract | Barley malt | Toners, brightening products |
A note on oats: oats do not naturally contain gluten. The risk comes entirely from wheat cross-contamination during growing and milling, which is why the certification is what matters rather than the oat itself. The colloidal oatmeal we use is certified gluten-free.
Common food allergen INCI names in skincare
| INCI name | Allergen | Common in |
|---|---|---|
| Prunus Amygdalus Dulcis Oil | Sweet almond (tree nut) | Body oils, face oils, beard oils |
| Arachis Hypogaea Oil | Peanut | Some "natural" baby products |
| Glycine Soja Oil / Protein / Extract | Soy | Widespread: emollients, serums, baby products |
| Butyrospermum Parkii Butter | Shea (tree fruit — confirm with your allergist if you have tree nut allergy) | Extremely widespread in body care and lip products |
| Cocos Nucifera Oil | Coconut | Body care, hair products, "natural" cleansers |
| Sesamum Indicum Seed Oil | Sesame — now a major declarable food allergen in the US | Body oils, some facial oils |
| Hydrolyzed Milk Protein / Casein / Lactose | Dairy | Some anti-ageing creams |
| Ovum / Hydrolyzed Egg Protein | Egg | Some hair masks and serums |
Preservative red flags for reactive skin
| Ingredient | Concern |
|---|---|
| Methylisothiazolinone (MI) / Methylchloroisothiazolinone (MCI) | The most reactive common preservative; a widespread contact allergen |
| DMDM Hydantoin / Imidazolidinyl Urea / Diazolidinyl Urea | Formaldehyde releasers; cause delayed reactions people rarely connect to the product |
| Methylparaben / Propylparaben / Butylparaben | Contact allergens in some individuals; the wider health concerns are more contested than commonly presented |
| Benzyl Alcohol | Both a preservative and a fragrance compound; sensitising for reactive skin |
| Phenoxyethanol | Widely used and generally well tolerated, but can cause contact allergy in sensitive individuals |
Hidden fragrance INCI names, even in "unscented" products
These individual fragrance compounds sometimes appear as standalone ingredients rather than under the "fragrance" umbrella — and are just as allergenic: linalool, limonene, geraniol, citronellol, eugenol, cinnamal, benzyl alcohol, coumarin, isoeugenol, citral, farnesol, hydroxycitronellal.
The EU requires 26 fragrance allergens to be individually declared above certain concentrations. The US does not, but many brands include them anyway. If you see any of these, the product contains fragrance allergens regardless of whether "fragrance" appears separately. The full list is in Fragrance Allergy: The 26 Names to Check.
The five-step allergen audit for any product
- Scan for fragrance or parfum first. If it is there, close the lid. It is the single highest-risk ingredient for reactive skin and there is no way to know what is inside it.
- Search for your specific food allergens using their INCI names. For celiac: every wheat, barley and rye name, plus any non-certified oat. For tree nut allergy: almond, coconut, shea — confirm the last with your allergist. For soy: Glycine soja in any form.
- Check preservatives. Look for MI/MCI, formaldehyde releasers and parabens.
- Check for hidden fragrance INCI names in the lower portion of the list.
- When in doubt, contact the brand. Ask directly: does this contain any gluten-derived ingredients, and is it manufactured in a facility that processes my allergen? Brands that can answer, answer quickly.
Why EpiLynx ingredient transparency is different
Most brands do not design their products for people who need to read labels this carefully. EpiLynx was built by a pharmacist who does. Every formula is reviewed not just for efficacy but for:
- Complete absence of gluten-derived ingredients — wheat, barley, rye, and only certified gluten-free oats
- Absence of the major FDA food allergens in any form, including their INCI equivalents
- Fragrance-free — no synthetic fragrance, no essential oil blends
- Well-tolerated preservative systems — no MI/MCI, no formaldehyde releasers
- Full INCI lists published and easily accessible
Explore the full EpiLynx Ingredients Glossary.
What I actually reach for
- Gentle Hydrating Facial Cleanser — no sulfates, no fragrance, no MI/MCI.
- Lightweight Face Moisturizer — for normal to combination skin.
- Miracle Face Cream — for dry, reactive skin.
- Brightening Vitamin C Serum — a stable form in a fragrance-free base.
- Complete Glow Ritual 3-Step Set — a whole routine, one ingredient list.
Shipping is free over $39, and EPILYNXGLOW25 takes 25% off.
Frequently asked questions
How are skincare ingredients listed on labels? Using INCI — standardised Latin and chemical names in descending concentration order. Anything at 1% or less can appear in any order in the lower portion.
Are cosmetics required to list allergens the way food is? No. FALCPA covers food only. Cosmetic makers need not flag wheat, peanut or tree nut in plain language, so you must know the INCI names.
What does "fragrance" actually mean on a label? A protected trade secret that can represent dozens to hundreds of undisclosed compounds, including known allergens.
How do I find gluten in an ingredient list? Search Triticum vulgare, Hordeum vulgare, Secale cereale, hydrolysed wheat protein, wheat amino acids, and tocopherol without a stated non-wheat source.
Is oat safe if I have celiac disease? Certified gluten-free oats are. Ordinary oats are frequently cross-contaminated with wheat during growing and milling, so look for the certification rather than avoiding the oat.
Keep reading
- The 14 Allergens We Leave Out
- Fragrance Allergy: The 26 Names to Check
- How to Read Cosmetic Labels Like a Pro
- Gluten in Skincare: A Celiac Ingredient Guide
Written by Dr. Liia, PharmD, for educational purposes only. Not medical advice. For personalised allergy evaluation, consult a board-certified allergist.
