What ingredient is often used in shampoos to help with dandruff?

Salicylic acid is commonly included in shampoos specifically formulated to combat dandruff due to its keratolytic properties. It works by helping to break down and remove scale and flakes from the scalp, which are typical symptoms associated with dandruff. This ingredient effectively aids in exfoliating the scalp, promoting healthier skin renewal, and reducing the buildup of dead skin cells.

Silicone is generally used in hair care products for its ability to impart shine and smoothness to hair rather than addressing scalp health issues like dandruff. Sodium lauryl sulfate is a surfactant commonly used for its cleansing properties, which may strip natural oils from the scalp, potentially exacerbating dryness and irritation rather than alleviating dandruff. Glycerin serves as a humectant that attracts moisture but does not specifically target the causes of dandruff as salicylic acid does. Thus, salicylic acid is the most specialized ingredient for treating dandruff in shampoos.