Piroctone Olamine.

What it does

Benefits

• Reduces dandruff flaking and scalp itching by suppressing the Malassezia yeast that drives them
• Helps manage seborrheic dermatitis and an oily, irritated scalp
• A common, gentler-feeling alternative to zinc pyrithione in anti-dandruff shampoos
• Effective in rinse-off and leave-on scalp products at low concentrations (EU limits: 1.0% rinse-off, 0.5% leave-on)

Side effects

• Generally well tolerated; significant adverse reactions are uncommon
• As with any active, scalp irritation or sensitivity can occur in some people
• Mainly intended for the scalp and hair rather than as a facial-skin treatment

Who it's for

People with dandruff, flaky or itchy scalp, or seborrheic dermatitis looking for an effective anti-fungal scalp active

Who should be careful

Those with a known sensitivity to it; discontinue if the scalp becomes irritated, and see a clinician if flaking persists or worsens despite use

• Piroctone olamineencyclopedia

Researched & reviewed · July 2, 2026