The percentage of hair growth in anagen hair is influenced by which factor?

The percentage of hair growth in anagen hair is primarily influenced by the location of the body. Different areas of the body have varying rates of hair growth due to a combination of factors such as blood supply, larger hair follicle size, and density of hair follicles in those regions. For example, scalp hair typically has a longer anagen phase compared to hair in other areas, like the arms or legs, which can have a shorter growth phase.

In contrast, while hormonal balance, diet and nutrition, and genetic predisposition can affect hair growth in general, they do not specifically dictate the percentage of hair growth observed in the anagen phase as influenced by the anatomical location of the hair. Each body area operates under unique biological conditions that contribute to the growth patterns observed.