Key causes of gray hair:

Oxidative Stress:

Environmental factors, pollution, and exposure to UV radiation can lead to oxidative stress. This process involves the production of free radicals, which may damage the melanocytes and contribute to premature graying.

Nutrient Deficiency:

Deficiencies in certain vitamins and minerals, such as vitamin B12 and iron, can be linked to premature graying. These nutrients play a role in the production of melanin, and their deficiency can affect hair color.

Hormonal Changes:

Changes in hormonal levels, especially during significant life events such as puberty, pregnancy, and menopause, can affect melanin production. Hormonal fluctuations may contribute to the early onset of gray hair.