Hair & Scalp · Remedies & products
Anti-Dandruff Shampoo: Which Active Works, and How Often to Use It
An anti-dandruff shampoo earns its place when it carries an antifungal active, often alongside an ingredient that loosens scale. Ketoconazole and ciclopirox are among the best-studied antifungal actives. Pooled against placebo, ketoconazole 2% cut the risk of failed clearance at four weeks by 31%, and ciclopirox 1% by 21%. For the scalp, the ketoconazole 2% product information directs twice weekly for two to four weeks, then once every one to two weeks to keep it away.1,10
Which anti-dandruff shampoo ingredient actually works? Copy link
Several actives have controlled trial evidence behind them, and they are not backed equally, which is a gap you cannot see anywhere on the shelf or on the pack.
Ketoconazole and ciclopirox are the two most heavily investigated actives. Cochrane pooled 51 trials across 9,052 participants and found topical ketoconazole 2% reduced the risk of failed clearance at four weeks by 31% against placebo, across eight studies. It graded that comparison low-quality evidence, with substantial variation between trials. Ciclopirox 1% reduced failed remission by 21%, and Cochrane graded that comparison moderate-quality. It found insufficient evidence that any one antifungal outperforms another.1
The other actives sit further down. An overview of eight systematic reviews, presented in 2025, graded ketoconazole shampoo and ciclopirox at moderate certainty, selenium sulfide shampoo and coal-tar combinations at low, and zinc pyrithione shampoo at very low.9 That describes how well each has been studied. It is not proof that the weaker-evidenced ones fail, and plenty of people do well on them.
| Active | Strength | Evidence standing | What the trials show |
|---|---|---|---|
| Ketoconazole | 2% | Most direct scalp evidence; Cochrane graded the placebo comparison low-quality | Twice weekly for 2 to 4 weeks cleared scalp dandruff and seborrheic dermatitis in a multicentre placebo-controlled trial. Once weekly prevented relapse.3 |
| Ciclopirox olamine | 1% | Moderate-quality against placebo in Cochrane | One to three washes a week improved scaling, redness and itch. Comparable with ketoconazole where the two were tested head to head.1,2 |
| Selenium sulfide | 1% to 2.5% | Effective in comparisons; graded low-quality overall | 1% twice weekly matched ketoconazole 2% over 4 weeks in moderate-to-severe scalp seborrheic dermatitis, with faster quality-of-life gains. The 2.5% strength also matched it, with more side effects.2,9 |
| Piroctone olamine | 1% | Some clinical evidence; common in cosmetic formulations | Reduced hair shedding in a 6-month randomised comparison with ketoconazole and zinc pyrithione.7 |
| Zinc pyrithione | 1% | Widely used; graded very low-quality | Open-label improvement at twice weekly or more, measured against each person's own baseline.2,9 |
| Coal tar | 4% | Limited efficacy evidence; coal-tar combinations graded low-quality | Twice weekly for 4 weeks improved scaling and redness, below ketoconazole 2% in the same comparison.2,9 |
| Salicylic acid | varies | Keratolytic; no antifungal action | Used to soften and lift scale so an active can reach the scalp underneath. Often paired with one of the antifungals above.2 |
| Tea tree oil | 5% | Limited; one controlled trial | Daily for 4 weeks beat placebo in mild-to-moderate dandruff in a randomised single-blind study.2 |
One strength trap is worth knowing before you buy. Ketoconazole shampoos are sold at more than one concentration, and the over-the-counter strength in some markets is 1% while the medicated strength is 2%. The trials that cleared scalps used 2%. Check the number printed on the pack before you pay, especially if you are buying on a recommendation from outside India.
Which anti-dandruff shampoo is best in India? Copy link
The one whose active matches how bad your scalp is, and that you will still be using in three months. Little head-to-head evidence compares the major Indian retail products, Many retail-product rankings are assembled from reviews, availability and marketing copy, with no comparative data underneath them, which is why two lists published the same month can put entirely different bottles at number one.
Start by separating medicated from cosmetic. A medicated shampoo names a drug active and a strength on the pack, such as ketoconazole IP 2% w/w. A cosmetic one leads with fragrance and hair-feel claims, and may use different actives, concentrations and cosmetic bases. Labels such as dandruff removal, dandruff free and natural anti-dandruff are marketing categories with no agreed definition behind them.
Indian formulations change over time and often differ between variants of the same brand, so the name on the front is a poor guide to what is inside. Turn the bottle over and read the current ingredient panel. Ask your pharmacist for the molecule and the strength, then let the brand follow from there, because in practice the same three or four actives are doing the work across a shelf that looks like twenty separate choices.
Shampoos marketed to men and to women generally carry the same actives. What differs is the base, the fragrance and the conditioning system. The anti-dandruff mechanism itself is the same. Buy on the active and the scalp, then pick the version that suits your hair.
Sulfate-free is a separate question with no dandruff answer attached to it. Sulfate-free status is not itself an established treatment for dandruff. A sulfate-free base lathers less, and some people find it gentler on an irritated scalp, so treat it as a comfort choice. Judge the shampoo on its active.
Products sold for dandruff and hair fall together pair an antifungal with conditioning claims. The antifungal is what has been tested, and reducing flaking and itch also reduces the scratching that damages hair.
What causes dandruff? Copy link
The leading model involves three interacting factors: Malassezia, a yeast that lives on almost every adult scalp, the sebaceous lipids it feeds on, and individual susceptibility to what it leaves behind.4,6
Malassezia cannot make its own long-chain fatty acids. Its genome is missing the fatty acid synthase gene, so it has to take lipids from the skin it sits on. It secretes lipases that split the triglycerides in sebum, absorbs the saturated fatty acids, and leaves the unsaturated ones behind on the scalp surface.4,5
Oleic acid is one of the best-studied of those fatty acids. In susceptible people it is associated with scalp irritation, with skin cells being shed faster than usual, and with the flake you can brush off a shoulder. Dirt plays no part. Dry air alone does not do it either. Washing more often does not fix it on its own.
How to get rid of dandruff Copy link
Buying the right active is half of it. The other half is getting that active onto the scalp and leaving it there long enough to act. Incorrect application is one reason a medicated shampoo can appear not to work, and it is the reason worth ruling out before you spend money on a second bottle with a different active in it.
Part the hair and work the shampoo into your scalp with your fingertips. The flakes come off skin, so that is where the active has to land. Lathering the lengths does almost nothing for a scalp condition, which is why a thorough wash can still leave you flaking on Thursday. Leave it on while you finish the rest of the shower, then rinse.
How long should ketoconazole shampoo stay on your scalp?
Leave ketoconazole 2% shampoo on the scalp for about 3 to 5 minutes, then rinse thoroughly. That is the contact time the product information gives.10 Longer has not been shown to add benefit.
Expect visible change in two to four weeks. Naturally you will want it gone by Friday, and impatience is a common reason people abandon a product that was working. The trials that cleared scalps ran their treatment phase across two to four weeks of twice-weekly washing.3 If four weeks of correctly used ketoconazole 2% has produced little improvement, the thing to reassess is the diagnosis, the application technique and whether a different treatment is needed.
Scratching is the part people underrate. It can worsen irritation on a scalp surface that is already the weak link in this condition, and it can contribute to hair breakage or traumatic shedding. Keep your nails short. Itch that persists through correct treatment is a reason to reassess the diagnosis and the regimen, since irritation, psoriasis and contact dermatitis can all produce it.
How often should you use anti-dandruff shampoo? Copy link
For ketoconazole 2%: twice a week for two to four weeks to clear, then once every one to two weeks for maintenance. That is what the product information directs.10 The multicentre placebo-controlled trial that tested maintenance used once weekly and showed it prevented relapse, so weekly sits at the frequent end of the labelled range.3
The maintenance half is the one people skip. Dandruff that returns within weeks of a course that seemed to have worked often follows an abrupt stop once the flakes disappeared. The yeast has been suppressed. It still lives there, and the scalp that reacts to it is unchanged.
Daily ketoconazole is unnecessary. The studied and labelled regimens use it twice weekly, and more frequent washing has not been shown to add benefit. Tea tree oil 5% was the one active tested on a daily schedule.2
You can shampoo normally on the other days, because a gentle wash on Thursday does not undo the ketoconazole you used on Tuesday.
Keep the schedule on your phone for the first two months. Maintenance is easy to drift off once the scalp looks clear, and the drift is usually invisible until the flaking returns.
Can dandruff be cured permanently? Copy link
No. What you can get is indefinite control, and that is a different promise. The reason sits in an experiment from 2005 that rarely makes it into articles on this subject.
Twenty people with dandruff and twenty without washed with a 1% pyrithione zinc shampoo for three weeks, which levelled out the yeast on every scalp in the study before anything else was done. Then 7.5% oleic acid went on directly. The dandruff group flaked, significantly, on days five, seven and eight, while the non-dandruff group given the same dose on the same schedule did not flake at all. Yeast counts did not rise in either group, which is the detail that makes the experiment worth knowing, because it separates the flake from the size of the yeast population everyone assumes is driving it.6
So the flake looks like a reaction to what the yeast produces, which is one explanation for why two people can carry the same yeast and similar scalp oil while one of them sheds and the other does not. Skin barrier dysfunction is one of the three accepted drivers in the treatment literature. Antifungal treatment primarily suppresses the Malassezia component; it does not remove the underlying susceptibility.2
Stop washing and the yeast returns, because it is a resident of the scalp and the treatment was holding its numbers down rather than eliminating it. This is why dermatology guidance frames dandruff as a chronic relapsing condition that needs maintenance. Treat it the way you would treat blood pressure, on an ongoing basis, and it stays quiet.2
Two caveats. The researchers were employed by a shampoo manufacturer. And a single fatty acid stood in for the mixture the yeast actually produces. Skin barrier dysfunction is now one of the three accepted drivers in the treatment literature.2
Does dandruff cause hair fall? Copy link
Dandruff can accompany increased shedding, although the best quantitative evidence comes from men who had both dandruff and androgenetic-alopecia-associated shedding. In that population, treating the scalp reduced measured shedding and did not increase hair density.
The clearest trial randomised 150 men who had both dandruff and pattern hair loss. Each got one of three shampoos, two to three times a week for six months. Shedding fell by 17.3% with 1% ketoconazole, 16.5% with 1% piroctone olamine and 10.1% with 1% zinc pyrithione. The proportion of hairs in the growing phase rose by 4.9%, 7.9% and 6.8%.7
Hair density at the end of the study was unchanged in all three groups. That is the number the shampoo adverts leave out, and it is the one that should shape what you expect. Treating the scalp reduced measured shedding. It did not add hair back.
Reviews describe longstanding seborrheic dermatitis as capable of contributing to telogen effluvium, the reversible shedding that follows a scalp or whole-body stress, and as worsening pattern hair loss that was already under way. Inflammation and scratching are the proposed routes.4
Watch what happens to the flaking over the first two months. If the shedding settles as the flakes clear, that suggests the dandruff may have contributed. If the scalp is clear and the hair still thins at the temples or along a widening parting, that patterned thinning raises suspicion for androgenetic alopecia. The two can coexist, and a shampoo does not treat the second one. Topical minoxidil is.
Shedding that carries on after the flaking has cleared belongs with the other causes of hair loss, and the scalp is no longer the thing to treat.
The trial assessed shedding semiquantitatively and had no untreated control arm, so read the percentages as a direction of travel.
Dandruff or dry scalp? Copy link
They are treated differently, so the distinction is worth two minutes at the mirror.
Dandruff flakes are larger, often yellowish, and sit on an oily scalp, lifting off in clumps that you can see against a comb. Dry scalp flakes are small, white, powdery, and come with skin that feels tight. Dry skin elsewhere, on the arms or shins, may support the possibility of xerosis. It is a quick thing to check.
Naturally the two get confused, because both produce white bits on a dark shirt. Response to treatment helps: a dry scalp tends to improve with less frequent washing, a gentler surfactant and a moisturising conditioner, while flaking driven by Malassezia usually needs an antifungal to shift.
These clues are useful, and they are not a diagnostic test. Dry scalp, seborrheic dermatitis, psoriasis and contact dermatitis can overlap, and good skin care has a place in managing seborrheic dermatitis alongside an active. Persistent redness, marked itch, thick plaques or treatment failure warrants an examination.
Seborrheic dermatitis is the same process as dandruff, further along: redness, greasy yellow scale, and involvement past the scalp to the eyebrows, the sides of the nose or behind the ears. It needs the same actives, sometimes with a short course of a topical steroid prescribed alongside.2
Does hair oil help dandruff or make it worse? Copy link
Oil composition may matter biologically, because Malassezia takes up some fatty acids and not others. Clinical comparisons between different hair oils are sparse, so treat what follows as mechanism plus limited data.
Oils rich in oleic acid supply the same molecule used in that scalp challenge. Olive oil is roughly three-quarters oleic acid. Heavy scalp oiling is reported to worsen symptoms in some people, though no trial has compared different hair oils head to head as dandruff treatments.
Coconut oil behaves differently. It carries the only substantial Indian data on this question. A 16-week study followed 140 Indian women, 70 with dandruff and 70 without. It ran 12 weeks of treatment and four weeks of relapse, sampling the scalp microbiome throughout. In the dandruff group, coconut oil went with a shift towards the bacterial and fungal pattern seen on healthy scalps. That shift tracked with improvement in dandruff measures.8
Two limits. It was funded by a cosmetics manufacturer, and it was not a blinded comparison against a medicated shampoo, so the result sits well below the ketoconazole evidence in weight. Read what follows as a pragmatic position rather than a trial-established one: coconut oil is reasonable as a conditioning step once flaking is already controlled, and on a scalp that is actively shedding it does not replace an antifungal.
On the same pragmatic footing, and not from trial data: if you oil, oil before a wash instead of leaving it on a freshly treated scalp, and keep it as a conditioning step. Leave-on scalp serums sit in that same category, separate from a wash-off medicated shampoo.
Do home remedies for dandruff work? Copy link
Lemon juice, curd, apple cider vinegar, neem paste and aloe vera all appear in the search data at scale. Controlled trial evidence supporting any of them as a dandruff treatment is thin. That does not prove they are ineffective. They are not established treatments, and some of these preparations can irritate inflamed or sensitive skin.
Tea tree oil is the exception. A 5% shampoo used daily for four weeks beat placebo in mild-to-moderate dandruff in a randomised single-blind study, and tea tree oil inhibits Malassezia in the laboratory.2 That is real evidence, at a lower tier than the ketoconazole trials.
Oral supplements marketed for hair and scalp health, biotin among them, are not established treatments for dandruff.
When a dandruff shampoo is not enough Copy link
See a doctor if four weeks of correct use on a 2% product has changed little, because at that point the more likely explanations are a different diagnosis, a coexisting scalp condition, or a severity that needs a prescription behind it.
Scalp psoriasis produces thicker, silvery, well-edged plaques that often cross onto the forehead or behind the ears. Antifungals do little for it. Tinea capitis, a true fungal infection of the hair shaft, causes patchy scale with broken hairs stubbed off at different lengths, and it needs an oral antifungal because nothing washed over the scalp reaches far enough down the hair. Neither of those responds to a shampoo on its own, and both need a doctor to name them before anything sensible can be prescribed.
Redness and swelling of the scalp, weeping, or pain all warrant an examination. So does flaking that began with a new medicine. Take the packet of that medicine with you to the appointment.
Severe or resistant seborrheic dermatitis has prescription options waiting behind the shampoo aisle, including topical calcineurin inhibitors, short courses of topical steroids and newer non-steroid foams that a dermatologist can match to where on the body it has spread.2 Those need a prescription and a diagnosis first.
Common questions about anti-dandruff shampoo Copy link
Is dandruff contagious?
No. The yeast behind dandruff, Malassezia, already lives on almost every adult scalp, so there is nothing to catch and nothing to pass on. What differs between people is how the scalp reacts to the fatty acids that yeast leaves behind. That susceptibility is yours alone.
Can you remove dandruff in one wash?
One wash lifts the loose flakes off. Clearing the condition takes weeks, because the trials that cleared scalps ran two to four weeks of twice-weekly washing with ketoconazole 2% before anyone called them clear. Fresh flaking returns within days of a single wash. The yeast is barely touched.
Are supermarket anti-dandruff shampoos good enough?
For mild flaking, often yes. Supermarket anti-dandruff shampoos are cosmetic formulations, and their actives and concentrations differ between variants and markets, so read the ingredient panel. For flaking that keeps coming back, an active with stronger trial evidence, such as ketoconazole 2%, is the better next step.
Can you use anti-dandruff shampoo every day?
Ketoconazole 2% is labelled for twice-weekly use, so daily washing with it is unnecessary and has not been shown to add benefit. Other medicated shampoos carry their own directions, so follow the pack. Tea tree oil 5% was the one active tested on a daily schedule. Wash gently on other days.
Which shampoo is best for dandruff and hair fall?
No anti-dandruff shampoo is an established treatment for hair regrowth. In one six-month study of 150 men with dandruff and androgenetic-alopecia-associated shedding, ketoconazole, piroctone olamine and zinc pyrithione all reduced measured shedding, by 17.3%, 16.5% and 10.1%. None increased hair density.
References Copy link
- Okokon EO, Verbeek JH, Ruotsalainen JH, Ojo OA, Bakhoya VN. Topical antifungals for seborrhoeic dermatitis. Cochrane Database of Systematic Reviews. 2015;(5):CD008138.
- Turchin I, Albrecht L, Hanna S, et al. Current Understanding of Seborrheic Dermatitis: Treatment Options. Journal of Cutaneous Medicine and Surgery. 2025;29(4S):24S-36S. Supplement supported by Arcutis Canada.
- Peter RU, Richarz-Barthauer U. Successful treatment and prophylaxis of scalp seborrhoeic dermatitis and dandruff with 2% ketoconazole shampoo: results of a multicentre, double-blind, placebo-controlled trial. British Journal of Dermatology. 1995;132(3):441-445.
- Gupta AK, Landells I, Talukder M, et al. Understanding the Scalp: Dandruff and Seborrheic Dermatitis. Journal of Cutaneous Medicine and Surgery. 2025;29(5S):20S-26S. Supported by an unrestricted educational grant from Vichy Laboratoires, L'Oreal Canada.
- Saunders CW, Scheynius A, Heitman J. Malassezia fungi are specialized to live on skin and associated with dandruff, eczema, and other skin diseases. PLoS Pathogens. 2012;8(6):e1002701.
- DeAngelis YM, Gemmer CM, Kaczvinsky JR, Kenneally DC, Schwartz JR, Dawson TL Jr. Three etiologic facets of dandruff and seborrheic dermatitis: Malassezia fungi, sebaceous lipids, and individual sensitivity. Journal of Investigative Dermatology Symposium Proceedings. 2005;10(3):295-297.
- Pierard-Franchimont C, Goffin V, Henry F, Uhoda I, Braham C, Pierard GE. Nudging hair shedding by antidandruff shampoos. A comparison of 1% ketoconazole, 1% piroctone olamine and 1% zinc pyrithione formulations. International Journal of Cosmetic Science. 2002;24(5):249-256.
- Saxena R, Mittal P, Clavaud C, et al. Longitudinal study of the scalp microbiome suggests coconut oil to enrich healthy scalp commensals. Scientific Reports. 2021;11:7220.
- PD46 Efficacy And Safety Of Scalp Inflammation Treatment In Patients With Seborrheic Dermatitis: An Overview Of Systematic Reviews. International Journal of Technology Assessment in Health Care. 2025;41(S1). Conference abstract reporting a GRADE-based overview of eight systematic reviews.
- Ketoconazole 2% w/w Shampoo. Summary of Product Characteristics. electronic medicines compendium (emc), product 4559. Accessed 18 September 2026.
This article is general health information for readers in India and is not a diagnosis or a prescription. Medicated shampoos are medicines: follow the strength and frequency printed on the pack. Flaking that has not improved after four weeks of correct use, or that comes with redness, swelling, weeping or pain, needs a registered medical practitioner rather than another bottle. Editorial standards: joinsapiens.in/editorial-standards. Report an error on this page.