Which type of bristle helps to clean and add luster to hair?

Natural bristles are considered the best option for cleaning and adding luster to hair because they mimic the structure of human hair. Made from animal hair, such as boar or horsehair, natural bristles have the ability to distribute the scalp's natural oils along the hair shaft. This distribution not only cleans the hair by removing dirt and debris but also helps to condition it, resulting in a shinier and healthier appearance. The texture and flexibility of natural bristles allow for gentle brushing that can smooth the hair cuticle, reducing frizz and enhancing shine.

In contrast, synthetic bristles typically do not have the same ability to distribute oils and can sometimes lead to static, while flexible bristles may not provide the necessary cleaning action. Metal brushes can be too harsh for the hair and are generally better suited for specific styling tasks rather than for regular cleaning and conditioning. Thus, natural bristles stand out as the ideal choice for achieving shiny and well-maintained hair.