Ideally, a good shampoo should produce a voluminous lather and effectively cleanse the hair and scalp and should be easily rinsed out with water, leaving the hair soft, lustrous, and moisturized. The product should not adversely affect the scalp and hands or cause irritation to the eyes, particularly when children and baby formulations are considered.

Shampoos typically consist of an aqueous emulsion of several surfactants, at least one of which will have strong detergent properties, various additives to enhance cleansing performance or improve sensory attributes, one or more preservatives, and fragrance. Antidandruff shampoos can contain any one of a number of active ingredients,

Work best for getting rid of dandruff and can be prescription-strength if needed. Ketoconazole is an active ingredient in many dandruff shampoos and can be purchased over-the-counter or with a prescription if you need the strongest version.