Quick answer: a clarifying shampoo is a deep-cleansing shampoo that removes build-up that everyday shampoo leaves behind: styling products, silicones, oils, dry shampoo, and minerals from hard water. It's a reset, not an everyday wash for most people. Use it when your hair feels coated, limp or dull, typically somewhere between once a week and once a month depending on how much product you use, and follow it with conditioner or a mask.
What does clarifying shampoo do?
Everyday shampoos are designed to clean while leaving some conditioning behind. Over time, that residue, plus your styling products and oils, can build up. A clarifying shampoo cleanses more thoroughly to strip that layer away, so hair feels lighter, looks shinier and takes treatments, colour and styling products better.
Cleanse, clarify, purify: what's the difference?
The words get used almost interchangeably. Lorraine Matic, Head of Insight UK Education, explains that every shampoo's first job is to cleanse; what its ingredients do next is what sets it apart. A good everyday cleanser already removes dirt, oil and pollution. A clarifying or purifying cleanse simply goes deeper, for when the scalp or hair needs a reset. That's why many hairdressers now call shampoos "cleansers", in the same way they say "lightener" rather than "bleach". Read her guide to choosing the right Insight shampoo.
Signs you need a clarifying shampoo
- Hair feels coated, waxy or heavy even straight after washing.
- Your roots look greasy sooner than they used to.
- Hair looks dull or flat and won't hold volume or curl.
- Conditioner and masks don't seem to work any more.
- You use a lot of dry shampoo, oils, serums or styling products.
- You live in a hard-water area and hair feels rough or dull.
- You swim regularly.
How often should you use clarifying shampoo?
It depends on your hair and how much product you use, so treat these as starting points:
- Lots of styling product, dry shampoo or an oily scalp: around once a week.
- Average product use: every two to four weeks.
- Dry, curly, coloured or very damaged hair: only when you notice build-up, perhaps once a month, and always follow with moisture.
If your hair starts to feel dry or rough, you're clarifying too often.
How to use clarifying shampoo
- Wet hair thoroughly.
- Massage the shampoo into the scalp with your fingertips, then work the lather through the lengths.
- Rinse well. If hair was very coated, shampoo a second time.
- Always follow with conditioner, or a mask such as the Nourishing Hair Mask, to put moisture back into the lengths.
Is clarifying shampoo bad for coloured hair?
Strong clarifying shampoos can speed up colour fading, especially on fresh colour, toned blondes and vivid shades. If your hair is coloured, clarify only when you really need to, avoid it for the first week or two after a colour or toning appointment, and ask your colourist what they recommend. For everyday care, use a shampoo made for coloured hair; see shampoo and conditioner for coloured hair.
Clarifying vs anti-dandruff vs everyday shampoo
| What it targets | How often | |
|---|---|---|
| Clarifying shampoo | Product, oil and mineral build-up on scalp and hair | Occasionally |
| Rebalancing (oily scalp) shampoo | Excess oil and residue, gently enough for frequent use | As often as you need |
| Anti-dandruff shampoo | The causes of flakes on the scalp | Regularly while treating dandruff |
| Everyday shampoo | Normal cleansing for your hair type | Your usual wash routine |
A note on Insight's "Clarifying" range
Confusingly, Insight's Clarifying range is our anti-dandruff range. Purifying Shampoo and Purifying Scalp Treatment, with organic thyme, rosemary and sage, purify the scalp and have tested efficacy against dandruff. If flakes are your issue, start there, and read our guide to dandruff treatment.
If your problem is oil and residue rather than flakes, Rebalancing Shampoo works like a gentle clarifying shampoo, lifting away excess oil, impurities and styling residue with microalgae, grapefruit, organic birch and organic lavender. It's free from SLS and SLES and gentle enough to use regularly. For a deeper reset once a week, use Scalp Exfoliating Cream before you shampoo; its fine pine granules and kaolin clay lift oil and build-up from the scalp. Compare the two in Rebalancing vs anti-dandruff shampoo.
Every Insight formula is made with ozonated, purified water, so even our deeper cleansers are designed to be kind to the hair and scalp.
Frequently asked questions
Can I use clarifying shampoo every day?
Most people shouldn't; it can leave hair dry. If you need a fresh, deep-feeling clean every day because your scalp is oily, a rebalancing shampoo made for frequent use is a better fit.
Is clarifying shampoo good for curly hair?
Occasionally, yes. Curly routines often use lots of leave-ins and gels, so build-up is common. Clarify when curls look limp or won't clump, then follow with a mask. See how to use curl cream.
Should I clarify before a hair mask or colour?
Clarifying before a mask can help it work better. Before a colour appointment, ask your colourist; some like hair free of build-up, others prefer you don't wash right before.
Will clarifying shampoo help dandruff?
Not necessarily. It removes build-up, which can make flakes look better, but it doesn't target the causes of dandruff. Use a dedicated anti-dandruff shampoo such as Purifying Shampoo.
Is there a vegan clarifying shampoo?
Every Insight product is vegan and cruelty-free. For oil and residue, try Rebalancing Shampoo; for flakes, Purifying Shampoo.
About the author
Charlotte Read has spent six years in the hair industry with Insight Professional and holds a First Class BSc in Business Management and Marketing. She writes with reference to real salons across social media and the wider Insight community, and draws on the Insight office team, who between them bring over 100 years of combined experience on salon floors.
Where technical expertise is needed, Charlotte consults Lorraine Matic, Head of Insight UK Education, who brings over 38 years of global experience in colour, technique and hair science.