Sulphate-Free Shampoos for Sensitive Scalps: How to Choose
A buyer's guide to sulphate-free shampoos for itchy or reactive scalps: what 'sulphate-free' really means, what to look for, and what to avoid.
What “sulphate-free” actually means
Sulphate-free means the shampoo skips harsh foaming surfactants like sodium lauryl sulphate (SLS) and sodium laureth sulphate (SLES), using gentler cleansers instead. For a sensitive or itchy scalp, that usually means less stripping and less irritation.
What to look for
- No SLS or SLES near the top of the list.
- Gentle surfactants instead (though note even “gentle” ones like cocamidopropyl betaine bother some people).
- Fragrance-free or low-fragrance, since fragrance is a common scalp trigger.
- No methylisothiazolinone (MI), a preservative behind many scalp reactions.
What to watch
“Sulphate-free” does not mean fragrance-free or allergen-free, brands often add scent to compensate. Read the whole label, not just the front claim.
Check it against your triggers
To check a product, SkinSAFE lets you filter a product catalogue to screen out the ingredients you are avoiding and other allergens. That tells you what is in a product, but it rates it on general criteria rather than against your own list.
Once you know what you are screening for, a personal-list app like ClearaScan lets you save the ingredients you react to once and scan any product to flag only your triggers. It also keeps a Reaction Journal for flare-ups, a shared Care Circle so family or carers can scan for you, and a Trusted Products list for items you have cleared, and it is currently in early access. (Disclosure: our editor co-founded ClearaScan, and we are not paid to mention the others.)