Dandruff: What Works, What's Folklore, and When It's Not Dandruff

By the KABO Nutrition Team · fact-checked against cited public-health sources.

Dandruff is usually an inflammatory reaction to a yeast that lives on everyone's scalp — not dryness, and not poor hygiene. That single fact explains why oiling often makes it worse and why the right medicated shampoo works within a fortnight.

What is actually happening

Malassezia is a yeast that lives on virtually every human scalp. It metabolises sebum and releases fatty acids as a byproduct. Some people's skin reacts to those byproducts with inflammation and accelerated cell turnover — and that shedding is what you see as flakes.

Two things follow. Dandruff is not a hygiene failure. And it is not, despite universal belief, dryness — which is why applying more oil frequently makes it worse rather than better.

The oiling problem

Weekly oil massage is deeply embedded in Indian hair care and has genuine benefits for the hair shaft — reduced protein loss, easier detangling, less breakage.

For the scalp with active dandruff, it is a different matter. Coconut oil in particular supplies exactly the lipids Malassezia feeds on. If you oil and your flaking worsens, that is the mechanism, not coincidence.

The workable compromise: oil the lengths, not the scalp, while dandruff is active.

What genuinely works

• Ketoconazole 1–2% — antifungal, among the best-evidenced.
• Zinc pyrithione — antifungal and antibacterial, widely available.
• Selenium sulphide — effective, can discolour treated hair.
• Salicylic acid — lifts existing scale but does not address the yeast.
• Coal tar — slows cell turnover; strong smell.

The technique most people get wrong: apply to the scalp, not the hair, and leave it for three to five minutes before rinsing. An antifungal rinsed off in twenty seconds has not had time to act. Rotate between two actives every few months, as effect can plateau.

Home remedies, assessed

Neem has antifungal properties in laboratory work; evidence in scalp use is thin but it is safe as a rinse. Apple cider vinegar alters scalp pH briefly, with little evidence for dandruff specifically. Tea tree oil at 5% has some supporting evidence and is the strongest of the natural options. Lemon juice is acidic and irritating — avoid.

None of these outperform a proper medicated shampoo. Used alongside one, the harmless ones do no damage.

When it is not dandruff

See a dermatologist if there is well-defined redness with thick silvery scale (possible psoriasis), scaling that extends past the hairline onto the face (seborrhoeic dermatitis), patchy hair loss with scaling (possible fungal infection needing oral treatment), or intense itch with no response after a month of correct treatment.

Feeding the scalp from inside

Scalp skin renews constantly, and that renewal draws on protein, zinc, B vitamins and essential fats. Deficiency in any of them shows up as a scalp that heals slowly and a hair shaft that breaks easily.

Zinc in particular has a well-established role in skin repair, and Indian vegetarian diets are frequently low in it because phytates in grains and dals reduce absorption. KABO delivers 26 vitamins and minerals alongside 23–25 g of complete plant protein and 60+ superfoods in one serving, which is a practical way to keep that baseline covered while the medicated shampoo does the direct work.

Treat the yeast topically; supply the material internally. They address different halves of the same problem.

Frequently asked questions

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