A very common custom in women a few decades ago was to brush their hair for a few minutes before going to bed, to show off a healthy and shiny mane the next day.
It was mistakenly believed that brushing polished hair in the same way that an abrasive polishes marble or metal. In reality, what happens is that brushing stimulates the sebaceous glands throughout the scalp, which produce sebum. Do not forget that at the root of each hair there is a gland of this type. The brush is responsible for lubricating the hair with this natural oil that is sebum , which makes it reflect light. On the other hand, the tines of the comb remove dust particles and dandruff that make the hair dull.
