The Hidden Costs of Not Removing Makeup

The video explores hair cleanliness, focusing on the role of sebum and the necessity of shampoo. It explains how sebum protects but also attracts dirt, leading to the need for cleaning. An experiment shows why water alone can't clean hair, highlighting the role of surfactants in shampoo. The video also discusses the impact of frequent washing on sebum production and presents alternatives like homemade and dry shampoos.

What new insight or understanding did you gain from this video?