Experts Urge 3-Times-Weekly Medicated Shampoo for Dandruff Affecting About 50% of People
Updated
Updated · The Guardian · Sep 13
Experts Urge 3-Times-Weekly Medicated Shampoo for Dandruff Affecting About 50% of People
3 articles · Updated · The Guardian · Sep 13
Summary
About half the world’s population gets dandruff, and experts say mild cases usually respond to over-the-counter shampoos used three times a week and left on the scalp for several minutes.
Three common active ingredients—zinc pyrithione, selenium sulfide and ketoconazole—work by lowering Malassezia yeast and inflammation, though doctors say dandruff more broadly reflects a scalp “trifecta” of microbes, skin barrier function and immune response.
Dry, textured or coily hair may react poorly to ketoconazole or selenium sulfide, so dermatologists suggest gentler sulfate-free zinc pyrithione products and fragrance-free formulas to reduce breakage and contact allergy.
Red, sharply defined plaques, flakes returning within days of stopping treatment, or hair loss, burning or stinging should prompt a doctor visit, since psoriasis, allergy or scarring alopecia may be involved.
If basic shampoos fail, prescription ciclopirox, stronger ketoconazole or roflumilast foam are options, while probiotic-style scalp treatments remain too early for experts to recommend.