8 Things Nobody Tells You About Dandruff

By the ScalpRx Team · Last updated 4 October 2026
1

Dandruff isn't dry skin

Malassezia yeast cells under an electron microscope
MYTH

Flakes mean your scalp is dry, so it needs moisture.

FACT

Dandruff is linked to a fungus called Malassezia. It lives on your scalp and feeds on your scalp's own oil. The flakes and the itch are your skin reacting to the excess fungus.

2

It isn't dirt, so washing more won't fix it

An empty hairdresser's wash basin
MYTH

Dandruff means you're not washing enough.

FACT

Dandruff is not poor hygiene. Washing more can lift today's flakes, but the Malassezia is still there, feeding, and tomorrow's flakes come from it.

3

Coconut oil can make it worse

A jar of coconut oil, a scalp scrubber and a plain bottle on a bathroom counter

A flaky scalp looks dry, so oil feels like the obvious fix. But coconut and olive oil can feed Malassezia, which means a common first fix can give it more to eat.

If you've oiled your scalp and watched the flakes get bigger and stickier, the oil was feeding it.

4

There's an active made to go after the yeast: selenium disulfide

Selenium Disulfide printed on a shampoo label Look for an antifungal active on the label

You can't wash dandruff off. You have to kill the yeast.

Selenium disulfide is an anti-dandruff active that kills Malassezia. It's antifungal. It goes after the fungus behind the flakes and reduces scalp skin shedding.

5

Avoid products with oil in them. They can make it worse.

ON THE INGREDIENT LIST, WATCH FOR
Cocos Nucifera (Coconut) Oil Olea Europaea (Olive) Fruit Oil Other plant oils

Oil turns up in shampoos, conditioners, scalp serums and styling creams too. If the fungus feeds on oil, every product that leaves oil on your scalp gives it more to eat.

6

Medicated shampoos can dry out your hair

Hands working shampoo lather into the scalp

A common complaint about medicated shampoos is dry, stripped hair. A strong clean on the scalp can leave the lengths feeling rough. Look for a formula with moisture-holding ingredients, like hyaluronic acid.

7

ScalpRx ticks every box: the active, and no oils

A bottle of ScalpRx on a tiled shower shelf

ScalpRx was made to tick every box on this list:

  • The active: selenium disulfide.
  • No oils in the formula.
  • Deep cleaning
  • Moisture built in: hyaluronic acid holds moisture in your scalp and hair.
ScalpRx
Coconut, olive and other oils
Scrubs, brushes and washing more
Sees dandruff as
A yeast
Dry skin
Dead skin
What it does to dandruff
Kills it
Can feed it
Strips it
Oil and buildup on your scalp
Clears buildup, helps control oil
Adds more oil
Lifts loose flakes
Try ScalpRx →
8

You get 90 days, and you keep the bottle

90-DAYMONEY-BACK
GUARANTEEKeep the bottle

Use it for up to 90 days, two or three washes a week. If you're not happy, send us an email and we'll refund you. You don't even need to send the bottle back.

Refund policy

Say hello to black shirts again

A man in a clean black jumper by a kitchen window
ScalpRx Anti-Dandruff Shampoo, 325 ml bottle

ScalpRx Anti-Dandruff Shampoo

  • Kills the fungus behind the flakes
  • Relieves the itch
  • Washes away buildup and visible flakes
  • Holds moisture in your scalp and hair
Up to 30% offLimited time availability
Try ScalpRx → 90-day money-back guarantee

Questions before you buy

Is it dandruff or a dry scalp?

Dandruff tends to come with oil, so flakes with greasy roots are a common sign. If your scalp bleeds or weeps, or you're unsure what it is, ask a pharmacist or your GP first.

How soon will I notice a difference?

Your scalp should feel clean after the first wash. 2 to 3 washes is all it takes to start seeing a difference. Keep using it two or three times a week. The guarantee runs for 90 days, so there's time.

How do I use it?

Massage it into a wet scalp and work it down to the skin. Leave it on for 3 to 5 minutes, then rinse it out through your lengths. Use it at least twice a week, as the label says. Keep it out of your eyes.

Will my dandruff come back?

Dandruff can come back when you stop. Regular washing with ScalpRx is how you keep it in check. Once your scalp is clear, keep washing with it twice a week, and a subscription means you won't run out.

What's in it?

Selenium disulfide is the anti-dandruff active, and hyaluronic acid holds moisture in the scalp and hair. There are no oils in the formula. The full ingredient list: Water, Sodium Laureth Sulfate, Ammonium Lauryl Sulfate, Ethylene Glycol Distearate, Soluble Collagen, Sodium Hyaluronate, C8-C14 Alkyl Glucoside, Cocamidopropyl Betaine, Selenium Disulfide, Fragrance, Sodium Chloride, Phenoxyethanol, Ethylene Glycol Stearate, Citric Acid, Disodium EDTA, CI 42090, Magnesium Nitrate, Methylchloroisothiazolinone, Magnesium Chloride, Methylisothiazolinone.

Why not just buy a cheaper dandruff shampoo?

Stay with a cheaper bottle if it already keeps your scalp clear. If it hasn't, look for an anti-dandruff active on the label and no oils in the ingredients. ScalpRx runs on selenium disulfide, with no oils in the formula, in a 325 ml bottle. If you're not happy, you have 90 days to get your money back.

Do I have to subscribe?

No. You can buy one bottle on its own. If you do subscribe, you can cancel any time.

Why does the bottle say WWP?

WWP is our supplier's brand, and their name is on the bottle. ScalpRx is the name we sell it under. The full ingredient list is printed on the back.