The primary reasons why hair may grow fast are genetics, hormones, age, nutrition, and overall health. Genetics largely dictate the speed of hair growth, meaning if fast-growing hair runs in the family, it likely affects you too. Hormonal changes, especially higher testosterone in men or hormonal shifts like pregnancy, can speed up hair growth. Younger people also tend to have faster hair growth due to higher metabolic and cell division rates. Nutrition rich in proteins and essential vitamins supports healthy, consistent hair growth. On the other hand, chronic stress or deficiencies can slow down growth. Overall, natural hair growth follows a cycle with phases of growth, rest, and shedding, and genetics mainly influence the length of the active growth phase, determining the speed.
In short, your hair growing fast is most often due to your genetic makeup combined with hormonal and nutritional factors that support rapid hair follicle activity.
