Answer:

Gray hair at 20 is not uncommon. Premature graying is defined as graying before the age of 30 in Asians, or having 50% gray hair before 50. Graying begins when our bodies stop or reduce the production of melanin, the pigment that gives hair its color.

Beyond cosmetic concerns, premature graying can indicate underlying health issues or biological mechanisms. Genetics plays a significant role; if your parents or relatives have premature graying, you're more likely to experience it too. Some families have a history of graying in their 30s or even younger. Chronic stress, deficiencies in vitamin B12, iron, zinc, or copper can also disrupt melanin production, leading to hair losing its color.

Additionally, conditions like thyroid disorders, lupus, vitiligo, or the buildup of hydrogen peroxide in hair follicles can interfere with natural pigmentation.

There's no proven method to permanently reverse gray hair. However, you can take steps to improve hair health. A diet rich in vitamins and minerals is crucial. Managing stress through a healthy lifestyle, including sufficient sleep and regular exercise, also contributes to hair health. If you have significant graying, dyeing your hair can improve your appearance and boost confidence. However, choose safe hair dyes to minimize health risks.

Gray hair isn't a disease but a natural biological process. Its onset varies from person to person. Instead of worrying or searching for a "miracle cure," focus on overall health. If you're concerned, consult a dermatologist or endocrinologist.

Doctor Nguyen Tien Thanh

Vietnam Dermatology Association