The most oft-quoted average rate of human hair growth is 6 inches (15 centimeters) per year. However, the majority of studies measuring the rate of hair growth didn't take into account the race of ...

Does it last on human hair? If so, how long and depending on the style of hair, would it last longer? Like braids that are weaved tight or hair that doesn't leave a lat of room on the scalp? Well, Dr.