What's In Dandruff Shampoo?

Dandruff affects 50% of adults globally. To get rid of dandruff, there are specific anti-dandruff shampoos. But what are the causes of dandruff, and what ingredients in Head & Shoulders shampoo help prevent a flaky scalp? 

Cosmetic chemist Erica Douglas, otherwise known as “Sister Scientist,” breaks down how the ingredients in Head & Shoulders Classic Clean shampoo work.

• 0:00 Meet Erica Douglas, a cosmetic scientist
• 0:31 Head & Shoulders' simple formula: how pyrithione zinc fights dandruff
• 1:27 Surfactants and conditioners: how your scalp is cleaned and moisturized
• 4:13 Color and fragrance
• 6:08 Consistency, preservatives and pH adjusters
• 7:33 Head & Shoulders’ packaging: what would Erica change?