# Fragrance-Free Shampoo for a Sensitive Scalp

> A genuinely fragrance-free shampoo for sensitive scalps: what 'fragrance-free' really means, how it differs from 'unscented,' and why CAPB is left out.

*Updated: 2026-09-23*

**A fragrance-free shampoo is one made with no added parfum or masking scent at all — which matters because fragrance is one of the most common causes of scalp and skin irritation.** "Fragrance-free" is not the same as "unscented": an unscented product can still contain a masking fragrance added to cover the smell of raw ingredients. If you have a sensitive or reactive scalp, look for the words *fragrance-free* and check the ingredient list for "parfum," "fragrance," or "aroma" — and remember that fragrance is rarely the only trigger. Reactive scalps often respond to more than one ingredient, so the surfactants matter too. A contact allergy is a medical matter: patch-test, read the full INCI list, and see a healthcare professional or allergist if your scalp reacts.

**At a glance**

- **Fragrance-free** means no parfum, no essential oils, and no masking scent were added. **Unscented** only means no obvious smell; DermNet and the FDA both note that unscented products can still contain a masking fragrance.
- Fragrance is the most common cause of contact dermatitis from cosmetics; fragrance allergy affects about 0.7 to 2.6% of the general population and 5 to 11% of patch-test populations.
- On a US label a whole blend can be listed as the single word "fragrance" because the FDA treats the formula as a trade secret; the EU requires 26 named fragrance allergens (for example linalool, limonene) to be listed individually.
- "Hypoallergenic" has no Federal definition; the FDA says it means whatever a company wants it to mean.
- Fragrance-free is not enough if your trigger is a surfactant (cocamidopropyl betaine) or a preservative (methylisothiazolinone); check those lines of the INCI too.
- Baresel is fragrance-free and CAPB-free: $22 · 250 ml · pre-order, charged only when it ships · free worldwide shipping.
- A contact allergy is a medical matter: read the full INCI and patch-test with a dermatologist or allergist.

**Fast facts**

- **Fragrance** (parfum/perfume) is a leading cause of cosmetic contact allergy — a single "fragrance" line can hide dozens of individual aroma chemicals.
- **Fragrance-free = no added scent at all.** No parfum, no essential oils, no masking fragrance.
- **"Unscented" is different:** it can still contain a masking fragrance whose job is to neutralise the smell of the base — so an "unscented" product is not necessarily fragrance-free.
- Reactive scalps often react to **more than one ingredient** — commonly fragrance *and* a surfactant such as cocamidopropyl betaine (CAPB).
- The only way to know your own triggers is to **read the full ingredient list and patch-test**; "hypoallergenic" is a marketing word, not a guarantee.
- Baresel is genuinely **fragrance-free (no parfum, no masking scent) and CAPB-free**, formulated for sensitive, reactive scalps.

## Why fragrance is a problem for sensitive scalps

Fragrance is one of the most frequently identified triggers in cosmetic contact allergy. The challenge is that "fragrance" (listed as *parfum*, *perfume*, or *aroma*) is an umbrella term: a single line on an ingredient list can represent dozens of individual aroma chemicals, and manufacturers are generally not required to break every one of them out. That makes it hard to know exactly what you are putting on your scalp. On a scalp that is already sensitive, inflamed, or barrier-compromised, added fragrance is simply extra risk for no cleansing benefit — the scent does nothing to clean your hair. Leaving it out is a straightforward way to reduce the number of things your skin has to tolerate. If you have a diagnosed fragrance allergy or suspect one, that is a question for a dermatologist or allergist, who can patch-test you against standardised fragrance markers.

## "Fragrance-free" vs "unscented": the distinction that trips people up

These two labels sound interchangeable, but for a reactive scalp the difference is the whole point. **Fragrance-free** means no scent has been added — no parfum, no essential oils, no masking fragrance. **Unscented** means the product does not have an obvious smell — but manufacturers sometimes achieve that by adding a *masking fragrance* to cover the natural odour of the raw ingredients. So an "unscented" shampoo can still contain fragrance chemicals, and can still trigger a fragrance-sensitive scalp. The label alone is not enough: always read the ingredient list and look for "parfum," "fragrance," or "aroma." If you see them, it is not fragrance-free, whatever the front of the bottle says.

**Fragrance-free vs unscented**

|  | Fragrance-free | Unscented |
| --- | --- | --- |
| Added parfum / perfume | None | Sometimes none… |
| Masking fragrance | None | …but often present to hide the base smell |
| What it means for you | No fragrance chemicals added at all | May smell neutral, yet still contain fragrance |
| How to verify | Check INCI for "parfum/fragrance/aroma" — should be absent | Check INCI — masking fragrance may still be listed |

## Fragrance is often not the only trigger

Here is the part many fragrance-free shampoos miss: a reactive scalp frequently reacts to more than one thing. You can switch to a fragrance-free product and still get itching, tightness, or flaking because a *surfactant* — the cleansing agent — is the culprit. One common example is **cocamidopropyl betaine (CAPB)**, a mild secondary surfactant found in a huge share of "gentle," "sensitive," and even fragrance-free shampoos. CAPB is well documented as a contact allergen; it was named Allergen of the Year in 2004 by the American Contact Dermatitis Society. So a product can be perfectly fragrance-free and still contain a surfactant you personally do not tolerate. Removing fragrance narrows the field of suspects — but for a genuinely reactive scalp, it helps to also narrow the surfactant list.

> Cocamidopropyl betaine is a surfactant used in many personal-care products, including shampoos and washes. It is a recognised cause of allergic contact dermatitis; sensitisation is often linked to impurities generated during its manufacture rather than the pure molecule itself.

## What to look for on the label

**Fragrance-related names on a shampoo INCI**

| What you see on the label | What it is | Counts as fragrance-free? |
| --- | --- | --- |
| Parfum / Fragrance / Aroma | An undisclosed blend; on a US label the whole blend can be listed under this single word. | No |
| Linalool, limonene, citronellol, geraniol, coumarin and other EU-listed names | Individual fragrance allergens the EU requires to be named when present above a threshold; often listed after "parfum." | No |
| Essential oils (e.g. Lavandula angustifolia oil, Mentha piperita oil) | Botanical fragrance materials; they scent the product and can contain the same allergens. | No |
| "Botanical," "herbal," or "natural" extracts | Plant extracts that may carry fragrance components; DermNet advises caution even on products labeled fragrance-free. | Check each one |
| "Unscented" on the front, parfum in the INCI | A masking fragrance added to neutralize the smell of the base. | No |
| No parfum, fragrance, aroma, essential oil, or fragrance allergen anywhere in the INCI | What genuinely fragrance-free looks like. | Yes |

**A sensitive-scalp checklist**

- **No "parfum," "fragrance," or "aroma"** anywhere in the ingredient list — that is what genuinely fragrance-free looks like.
- **Don't rely on "unscented" alone** — verify against the INCI list rather than the front-of-pack claim.
- **Know your surfactants** — if you have reacted before, note whether CAPB (cocamidopropyl betaine) or sulfates (SLS/SLES) were present.
- **Check preservatives** — some people react to methylisothiazolinone (MI/MCI) or to formaldehyde-releasers like DMDM hydantoin; the label tells you which system is used.
- **Patch-test a new product** before full use, and treat any persistent reaction as a reason to see a healthcare professional or allergist.
- **Treat "hypoallergenic" with caution** — it is not a regulated guarantee that you won't react.

> **Where Baresel fits:** Baresel is built for people whose scalp reacts to more than one thing. It is **genuinely fragrance-free** — no parfum, no essential oils, no masking scent — and it is also **cocamidopropyl-betaine-free (CAPB-free)** and free of sulfates (SLS/SLES). It cleans with a mild surfactant system (Sodium Cocoyl Isethionate, Sodium Cocoyl Glutamate, Sodium Methyl Cocoyl Taurate), conditions with glycerin and panthenol, and uses a named gentle preservative — not methylisothiazolinone (MI/MCI) and not a formaldehyde-releaser like DMDM hydantoin. We don't claim to treat, cure, or prevent any allergy or skin condition: Baresel simply leaves out two of the most common triggers so there is less on the list for a reactive scalp to tolerate. Always read the full ingredient list and patch-test, and see a healthcare professional if your scalp reacts. $22 / 250 ml.

## Frequently asked

**What is a fragrance-free shampoo?**

A fragrance-free shampoo is made without any added scent — no parfum, no essential oils, and no masking fragrance. On the ingredient list there should be no "parfum," "fragrance," or "aroma." Because fragrance is a common cause of cosmetic contact irritation and adds nothing to how well hair is cleaned, leaving it out reduces the number of ingredients a sensitive scalp has to tolerate.

**Is "unscented" the same as "fragrance-free"?**

No. Fragrance-free means no scent has been added at all. Unscented means the product has no obvious smell — but manufacturers sometimes achieve that by adding a masking fragrance to cover the natural odour of the base ingredients. So an "unscented" shampoo can still contain fragrance chemicals. Always verify by reading the ingredient list rather than trusting the front-of-pack word.

**I switched to a fragrance-free shampoo and my scalp still reacts. Why?**

A reactive scalp often responds to more than one ingredient. If fragrance isn't the problem, a surfactant may be — cocamidopropyl betaine (CAPB) and sulfates (SLS/SLES) are common examples — or a preservative such as MI/MCI. Compare the ingredient lists of products you did and didn't tolerate, and ask a dermatologist or allergist about patch-testing to identify your specific trigger.

**Why do so many "sensitive" shampoos still contain cocamidopropyl betaine?**

CAPB is inexpensive, foams well, and is milder than harsh sulfates, so it appears in a large share of "gentle" and "sensitive" formulas — including many fragrance-free ones. But it is a recognised contact allergen (named Allergen of the Year in 2004 by the American Contact Dermatitis Society), so "gentle" on the label does not mean everyone tolerates it.

**Is Baresel fragrance-free?**

Yes. Baresel contains no parfum, no essential oils, and no masking scent — it is genuinely fragrance-free. It is also cocamidopropyl-betaine-free and free of sulfates, so it leaves out two of the most common scalp triggers at once. This is a description of what the formula does and doesn't contain, not a claim to treat or prevent any allergy or skin condition.

**Can a fragrance-free shampoo cure my scalp allergy or dermatitis?**

No. No shampoo can diagnose, treat, cure, or prevent an allergy or dermatitis — those are medical matters. Choosing a fragrance-free (and, where relevant, CAPB-free) shampoo can reduce exposure to common triggers, but if you have a diagnosed or suspected contact allergy you should read the full ingredient list, patch-test new products, and see a healthcare professional or allergist for guidance and treatment.

**Related reading**

- [Baresel shampoo](/baresel-shampoo) — The fragrance-free, CAPB-free shampoo for sensitive, reactive scalps.
- [Full ingredient list](/baresel-ingredients) — Every ingredient in Baresel, and why it's there — so you can judge for yourself.
- [Shampoo for a sensitive, itchy scalp](/shampoo-for-sensitive-itchy-scalp) — What to leave out when your scalp reacts to more than one thing.
- [Shampoo for cocamidopropyl betaine allergy](/shampoo-for-cocamidopropyl-betaine-allergy) — Why fragrance-free alone may not be enough if CAPB is your trigger.
- [What is cocamidopropyl betaine?](/what-is-cocamidopropyl-betaine) — A plain-language explainer on this common surfactant and allergen.
- [MI/MCI-free shampoo](/mi-mci-free-shampoo) — The other common trigger in “gentle” shampoos.
- [Propylene-glycol-free shampoo](/propylene-glycol-free-shampoo) — A humectant many sensitive scalps react to.

**Sources**

- [DermNet — Cocamidopropyl betaine allergy](https://dermnetnz.org/topics/contact-allergy-to-cocamidopropyl-betaine)
- [American Academy of Dermatology — Contact dermatitis overview](https://www.aad.org/public/diseases/a-z/contact-dermatitis-overview)
- [DermNet — Fragrance allergy](https://dermnetnz.org/topics/fragrance-allergy)
- [DermNet — Contact reactions to cosmetics (fragrance as the most common cosmetic allergen)](https://dermnetnz.org/topics/contact-reactions-to-cosmetics)
- [Reeder MJ. Allergic contact dermatitis to fragrances. Dermatol Clin, 2020 (PubMed)](https://pubmed.ncbi.nlm.nih.gov/32475515/)
- [U.S. FDA — Fragrances in cosmetics](https://www.fda.gov/cosmetics/cosmetic-ingredients/fragrances-cosmetics)
- [U.S. FDA — Cosmetics Safety Q&A: "Hypoallergenic"](https://www.fda.gov/cosmetics/resources-consumers-cosmetics/cosmetics-safety-qa-hypoallergenic)

**Sources**

- [DermNet — Cocamidopropyl betaine allergy](https://dermnetnz.org/topics/contact-allergy-to-cocamidopropyl-betaine)
- [American Academy of Dermatology — Contact dermatitis overview](https://www.aad.org/public/diseases/a-z/contact-dermatitis-overview)
- [DermNet — Fragrance allergy](https://dermnetnz.org/topics/fragrance-allergy)
- [DermNet — Contact reactions to cosmetics (fragrance as the most common cosmetic allergen)](https://dermnetnz.org/topics/contact-reactions-to-cosmetics)
- [Reeder MJ. Allergic contact dermatitis to fragrances. Dermatol Clin, 2020 (PubMed)](https://pubmed.ncbi.nlm.nih.gov/32475515/)
- [U.S. FDA — Fragrances in cosmetics](https://www.fda.gov/cosmetics/cosmetic-ingredients/fragrances-cosmetics)
- [U.S. FDA — Cosmetics Safety Q&A: "Hypoallergenic"](https://www.fda.gov/cosmetics/resources-consumers-cosmetics/cosmetics-safety-qa-hypoallergenic)