Best Sulphate-Free Shampoo UK (2026): 5 Picks and What to Check on the Label

What is the best sulphate-free shampoo in the UK?

The best sulphate-free shampoo depends on why you want one. For most people with dry or frizzy hair, Noughty To The Rescue (£8.99) is our pick: genuinely sulphate-free, silicone-free and easy to buy. For an itchy or sensitive scalp, Klorane Soothing Shampoo with Peony is one of the mildest cleansers we found. For the whole family with no fragrance at all, choose Childs Farm OatDerma.

But "sulphate-free" is not the same as "gentle" or "allergy-free". Some sulphate-free shampoos contain fragrance, strong preservatives or other surfactants that are common allergens. This guide explains what to check on the label. If fragrance is your main concern, see our fragrance-free shampoo guide.

Our picks at a glance

Grades describe how well each product's approach (milder cleansers, fewer common irritants) is supported, not proof it improves hair.

What are sulphates, and why avoid them?

Sulphates (also spelled sulfates) are cleaning agents called surfactants. The two most common in shampoo are sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES). They lather well and remove oil effectively, which is why they are cheap and popular.

SLS is a known skin irritant: it is so reliably irritating that dermatologists use it as the irritant control in patch testing. In a rinse-off shampoo the contact time is short, so most people have no problem. But if you have a sensitive scalp, eczema or dry, fragile hair, a milder surfactant can be kinder. A dermatology review of shampoos explains that strong anionic detergents clean well but can leave hair rough and frizzy, while milder surfactants and conditioning agents reduce this.

Common sulphate-free cleansers include isethionates (sodium cocoyl isethionate), glucosides (decyl, lauryl or coco-glucoside), betaines (cocamidopropyl betaine) and amino acid surfactants (sodium lauroyl sarcosinate, glutamates).

Is sulphate-free better for your health?

For most people, it is a comfort choice rather than a health one. There is no good evidence that sulphates in shampoo harm general health at normal use. The realistic benefits are:

• Less dryness and irritation for sensitive scalps.
• Slower colour fading, since gentler cleansers strip less dye (mostly brand-tested).
• Better results for curly and textured hair, which loses moisture more easily.

The trade-off is that very mild shampoos can struggle with oily roots or heavy styling products. Sulphate-free formulas can also work for dandruff when paired with a proven active: a small study of a sulphate-free shampoo with piroctone olamine showed good anti-dandruff results. For persistent flaking, the NHS dandruff page recommends medicated shampoos.

What else should you check on the label?

Swapping sulphates is only half the story. A review of surfactant allergy found that some of the products most linked to allergic contact dermatitis are sulphate-free surfactants such as cocamidopropyl betaine and decyl glucoside. Also look for:

• Fragrance (parfum) and named allergens such as linalool and limonene.
• Methylisothiazolinone (MI) and methylchloroisothiazolinone (MCI): preservatives that caused a European wave of contact allergy in the 2010s. They are now banned in leave-on products and restricted in rinse-off ones, but a 2024 European audit still found MI allergy in about 3% of patients patch tested, with rinse-off cosmetics the most common trigger.
• Sulfosuccinates and sulfoacetates: these sound like sulphates but are milder, different chemicals. They are allowed in many "sulphate-free" products.

If your scalp keeps reacting, the NHS advice on contact dermatitis suggests seeing a GP, who can refer you for patch testing.

How we chose

We read the full ingredient list of each candidate and kept only shampoos with no SLS, SLES or other sulphates. We then noted fragrance, MI/MCI and the main cleanser so you can match a product to your skin. Picks span £6 to £30 across five brands, and we checked prices on live UK pages (brand stores, Ocado and Lookfantastic) in October 2026. We left out a popular "sulphate-free style" shampoo we found still contained TEA-sulfate and MI.

The best sulphate-free shampoos, reviewed

Noughty To The Rescue: best overall

Cleans with cocamidopropyl betaine and isethionates, has no sulphates or silicones, and is easy to find in UK supermarkets and from the brand. A good everyday choice for dry or frizz-prone hair. Caveat: it contains fragrance, and cocamidopropyl betaine is a known, if uncommon, allergen.

Klorane Soothing Shampoo with Peony: best for sensitive scalps

One of the gentlest formulas we found, with no strong foaming detergent at all, plus peony root extract and lactic acid. Good if your scalp itches after washing. Caveat: it contains fragrance, barely lathers and may need a second wash for oily roots.

Childs Farm OatDerma Fragrance-Free: best fragrance-free and budget

Mild glucoside and sultaine cleansers with oat, no fragrance and no sulphates, for about £6. Works for children and adults. Caveat: it may not shift heavy styling products.

Pureology Hydrate Sheer: best for coloured fine hair

A salon favourite for colour-treated hair, explicitly sulphate-free and vegan, using isethionate cleansers. Caveat: it contains MCI/MI preservatives, fragrance and silicones, so it is not one for allergy-prone scalps.

OLAPLEX No.4 Strengthening: best for bleached hair

No SLS or SLES, with amino acid and glucoside cleansers and OLAPLEX's bond-building ingredient for chemically damaged hair. Caveat: the page does not make an explicit sulphate-free claim, it contains fragrance and dyes, and bond-repair evidence is mainly from the brand.

What to avoid

• Assuming "sulphate-free" means fragrance-free or hypoallergenic. Check for parfum, MI/MCI and betaines if you react easily.
• "SLS-free" labels that still list SLES or ammonium lauryl sulfate. These are still sulphates.
• Expecting a big health effect. This is about comfort, hair condition and fewer irritants.
• Switching too often. If your scalp is reactive, change one product at a time and give it two weeks, so you can tell what helps and what does not.
• Overusing dry shampoo between washes. Build-up can leave mild cleansers struggling; an occasional clarifying wash solves it.

Bottom line

Sulphate-free shampoos are a sensible swap if your scalp is sensitive, your hair is dry, curly or coloured, or you simply want a milder wash. Noughty To The Rescue is our everyday pick, Klorane Peony the gentlest for itchy scalps and Childs Farm OatDerma the best fragrance-free budget option. Whatever you choose, read past the front label: fragrance and preservatives matter as much as sulphates for sensitive skin.