Acquired canities develops with which factor?

• A. Diet
• B. Age
• C. Stress
• D. Exercise

Answer: (B)

Acquired canities occurs as part of the aging process. Hair color comes from melanin produced by pigment cells in the hair follicle, and as we get older these pigment-producing cells become less active or die off. That gradual decline in melanin production means new hair grows in with less pigment, leading to gray or white strands. While genetics and other factors can influence when gray hair starts, aging is the primary driver, which is why this option fits best. Diet, exercise, and stress aren’t the main causes of graying; they can affect overall hair health in other ways, but they don’t determine the onset of acquired canities.