Shampoo-also known as hair wash or hair cleanser-is the most widely used hair-cleansing product and ranks among the most commonly utilized hair cosmetics. It serves to remove naturally secreted oils, sweat residue, shed skin cells, and external contaminants-such as dust, microorganisms, styling product residues, and unpleasant odors-that have accumulated on the scalp and hair, thereby maintaining the cleanliness of the scalp and hair while enhancing the hair's aesthetic appeal.
The term "shampoo" is a phonetic transliteration of the English word *shampoo*, which originally referred to the act of washing one's hair. Shampoos come in a wide variety of types, featuring diverse structural formulations; they are compounded from various surfactants and additives to deliver excellent hair care and beautifying effects.
