TL;DR: “Parfum” or “Fragrance” appears as one word on a label but can conceal hundreds of chemicals; EU law protects these formulas as trade secrets. It is the single most common source of allergens in cosmetics. For sensitive skin, “fragrance-free” (not just “unscented”) is the correct label to look for.
When reading the INCI list of a cosmetic product, one of the most frequent words you’ll encounter is Parfum — or in English-labelled products, Fragrance. One word, but behind it lies one of dermatology’s most studied and most contentious topics.
Why Is It Permitted as “Just One Word”?
Fragrance formulas are classified as trade secrets in EU and international law. A fragrance house or cosmetics company invests significantly in developing a signature scent — and that formula is valuable intellectual property that could be replicated by competitors.
The EU Cosmetics Regulation (EC 1223/2009) therefore does not require manufacturers to disclose the individual components of a fragrance blend. Writing “Parfum” or “Fragrance” on the INCI list is legally sufficient.
The practical consequence: when a product says it contains fragrance, that single word might represent 10 ingredients or 300. You have no way of knowing from the label alone.
Pressure to reform this has grown. The EU’s 2023 cosmetics regulation update included discussions on fragrance transparency; trade secret protection has largely been maintained, though the mandatory allergen list has been expanded (from 26 to 56 substances as of new regulations).
Why Does This Matter Clinically?
Fragrance components are the most common allergen source in cosmetics. This isn’t a fringe claim — it’s supported by decades of dermato-epidemiological data.
Key findings from SCCS (the EU’s Scientific Committee on Consumer Safety) and contact dermatitis literature:
- Fragrance is consistently the leading cause of contact dermatitis in cosmetic users
- In patch test series (standard allergy testing for skin reactions), fragrance allergens account for a large proportion of positive reactions
- Approximately 1–4% of the general population is estimated to have fragrance sensitization
- Among people with eczema, rates of fragrance sensitivity reach 30–50%
The skin reaction is often not immediate. Delayed hypersensitivity (Type IV) develops through repeated, prolonged exposure — sometimes after years of using the same product without reaction. When it develops, identifying the specific culprit ingredient can take extensive patch testing.
The EU’s Mandatory Allergen List
The EU Cosmetics Regulation identified fragrance components that must be listed separately on packaging when present above threshold concentrations (0.01% in leave-on products; 0.001% in rinse-off). The list was recently expanded from 26 to 56 substances.
Key mandatory allergens:
| Ingredient | Commonly found in | Sensitization potential |
|---|---|---|
| Linalool | Lavender, citrus, bergamot fragrances | Moderate |
| Limonene | All citrus-scented products | Moderate-High |
| Geraniol | Rose, geranium, ylang-ylang scents | High |
| Citronellol | Rose, eucalyptus fragrances | Moderate |
| Eugenol | Clove, vanilla, cinnamon scents | High |
| Cinnamal | Cinnamon-based fragrances | High |
| Isoeugenol | Floral, rose-wood fragrances | High |
| Coumarin | Meadow, vanilla, tobacco fragrances | Moderate-High |
| Amyl cinnamal | Sweet floral fragrances | Moderate |
| Oakmoss / Treemoss extracts | Forest, nature-inspired scents | High — now restricted |
If you see any of these in an INCI list, it means the manufacturer was legally required to disclose it — the concentration exceeds the threshold. These are already the known sensitizers from the fragrance family.
Why Do Linalool and Limonene Appear Everywhere?
These two appear on nearly every product’s INCI list because they’re naturally occurring constituents of botanical extracts. Any product containing true lavender essential oil automatically contains linalool. Orange extract inherently contains limonene.
The complication: both linalool and limonene undergo oxidation when exposed to air, converting to more potent allergens (linalool peroxide, limonene peroxide). An older, opened product presents higher sensitization risk than a fresh one. This is why storage conditions matter — keep fragrant products away from air and heat, and don’t use products past their PAO (Period After Opening) symbol date.
Is “Fragrance-Free” the Same as “Unscented”?
No — and this distinction is clinically important.
Fragrance-free: Contains no fragrance components whatsoever. INCI list shows no “Parfum/Fragrance” and none of the mandatory allergens. This is the claim to look for if you have fragrance sensitivity.
Unscented / No added fragrance: Has no perceivable scent — but this may be achieved through masking fragrances (chemicals that neutralize odor without adding a recognizable scent). These masking agents can themselves be fragrance allergens. An “unscented” product is not guaranteed to be fragrance-free.
If you need truly fragrance-free, verify through the INCI list, not the front label claim.
Who Needs to Be Most Careful?
| Group | Recommended action |
|---|---|
| Eczema (atopic dermatitis) | Fragrance-free products only; INCI verification |
| Rosacea | Avoid fragrance and high-alcohol products |
| Contact dermatitis history | Patch test before new products; maintain personal allergen list |
| Reactive / sensitive skin | Default to fragrance-free; introduce new products slowly |
| Infants and children | Fragrance-free only; developing skin barrier |
| Pregnant / breastfeeding | Minimize fragrance exposure; precautionary principle |
| Asthmatics | Avoid aerosol fragrance application; airborne allergens trigger asthma |
How to Investigate Fragrance Sensitivity
If you suspect fragrance sensitivity:
- Elimination approach: Switch to completely fragrance-free products for 4–6 weeks. Improvement suggests fragrance as the cause.
- Patch testing: A dermatologist can perform European Standard Series patch testing, which includes a fragrance mix. This identifies your specific sensitizers.
- Product elimination: If symptoms correlate with a specific new product, that product is your investigation target. Introduce products one at a time when adding new items.
Note that once fragrance sensitization develops, it typically persists. Management means ongoing avoidance of sensitizers, not a cure.
Are Natural Fragrances Safer Than Synthetic?
This is a common misconception. Natural essential oils contain multiple compounds — many of which are known allergens (linalool, limonene, eugenol are all natural). In some respects, synthetic fragrance molecules are more predictable because they’re isolated compounds whose allergenicity has been specifically studied.
“Natural fragrance” doesn’t mean lower allergen risk. Often the opposite is true — complex botanical essential oils may contain more potential allergens than a single well-studied synthetic aromatic.
Cosmedoe automatically flags fragrance components in scanned products, identifies the mandatory allergens it can see, and assesses overall fragrance burden — giving you a clearer picture than the single word “Parfum” ever could.