Washing your hair seems like a given for a healthy shine. Most shampoos work the same way, by attacking dirt that accumulates in sebum. Like any oil, sebum is a dirt magnet. It attracts dust, pollen and other substances, as well as sweat and styling product residue. These grimy globules are not only unhygienic, they're shine killers too.
Shampoos contain chemical compounds called detergents, or surfactants. When you lather up, surfactants bind the dirt with the water. Rinse and it all goes down the drain. Many shampoos also contain conditioners to compensate for the loss of sebum.
That being said, shampoos come in different formulas, and it pays to know which ones are right for you. For example, what's your hair type? Fine hair is more fragile than thick hair and may need gentler surfactants. A shampoo for fine hair may not do the trick for thicker locks.
Likewise, some dandruff shampoos have selenium sulfide to control flaking. But that compound can discolor fair hair. Shampoos that use other ingredients might be better for blondes.
Shampooing routines also vary from one person to another, but certain factors apply to all. For instance, hair is more vulnerable to breaking when wet. Water molecules infiltrate the protein molecules, weakening their bonds. Shampoo only as often as your hair care needs dictate. Work shampoo into your scalp and massage it into the rest of the hair. Rinse, and then blot or gently squeeze dry with a towel.