What condition occurs when hair loses its pigment and turns grey?

The condition in which hair loses its pigment and turns grey is commonly associated with aging. As individuals get older, the melanocytes, which are the cells responsible for producing the pigment (melanin) in hair, gradually decrease in function. This results in less melanin being produced, leading to the hair appearing grey or white.

This process is a natural part of the aging phenomenon and occurs over time, reflecting changes in hair and skin as a person ages. While factors such as damage, dryness, and brittleness can affect the overall health and appearance of hair, they do not specifically cause the loss of pigment. Therefore, aging is the most accurate answer when it comes to hair turning grey.