The most common cause of dull hair is buildup from commercial products. Most commercial shampoos and conditioners contain silicones, which coat the hair and can initially make it look smooth and shiny. Over time, this coating builds up, locks moisture out of the hair and results in dry, dull hair.

For those who want to keep using silicones, the solution is to clarify every few weeks to remove the buildup. Adding a few teaspoons of baking soda to regular shampoo is an effective clarifier. Clarifying can make hair dry, so follow with a moisture treatment.

Some people prefer to avoid silicones, as they mask damage rather than repairing it. For these people there are a variety of options for achieving shiny hair.

Using Broccoli Seed Oil on Hair

Broccoli seed oil performs a function similar to silicones – it is a natural alternative to shine serums. The oil is expensive, but only a tiny drop is required. Rub the oil into the palms of the hands and then smooth over the hair.

Rinsing Hair With Cold Water

During a shower, hot water opens up the cuticle of each hair. To close down the cuticle again, sealing in moisture and providing hair with a sleek and shiny surface, finish each shower with a blast of cold water to saturate the hair. Some people prefer to simply dip the length of their hair in a basin full of cold water afterwards.