Final answer:
It is true that specialty shampoos contain ingredients to reduce dandruff and address scalp conditions, using surfactants to clean and additional components for conditioning and aesthetic effects.
Step-by-step explanation:
It is true that some shampoos contain special ingredients that are effective in reducing dandruff or relieving other scalp conditions. These shampoos may include specific formulations such as antifungal agents or other medications to address skin conditions and manage the production of sebum. The key ingredient in many shampoos is a surfactant like sodium lauryl sulfate or sodium laureth sulfate which helps to trap and remove oil and grease.
Adding to the effectiveness of these shampoos, ingredients like glycol distearate provide a pearlescent effect while waxes and silicones offer conditioning benefits. Specialty shampoos also take into account various user needs, including those with gluten or wheat allergies and infants, where formulations like baby shampoo are less irritating to the eyes.