Genetics : If you notice white hair at an early age, it’s likely that your parents or grandparents also had graying or white hair at an early age.
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Smoking : A 2013 study found that people who smoke cigarettes have more gray hair before age 30.
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Stress : Stress is thought to cause premature white hair because it depletes melanocyte stem cells.
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Alopecia areata : Alopecia areata is an autoimmune disease that can cause hair loss.
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Vitiligo : This can also affect parts of the body that have hair, turning the hair white or gray.
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Thyroid disorders : Hormonal changes due to thyroid conditions like hyperthyroidism can also be to blame for too-soon white hair.
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