At what age does the first gray hair usually appear?

The first gray hairs typically begin to appear after age 30, which is a normal physiological manifestation of aging as melanocytes gradually lose their function. If a large number of gray hairs suddenly emerge before age 30, especially accompanied by symptoms such as skin white patches or fatigue, prompt medical evaluation is recommended.

Melanocytes are responsible for synthesizing melanin pigment. With age, the number and activity of these cells decrease, leading to reduced pigmentation in hair and resulting in graying. Genetic factors also influence the timing of graying—individuals whose parents experienced early graying are more likely to develop gray hair earlier themselves, which is considered a normal hereditary pattern.

Acquired factors such as excessive mental stress, chronic sleep deprivation, and malnutrition may accelerate the decline of melanocyte function, causing premature graying. Prolonged anxiety can disrupt endocrine balance, while deficiencies in B vitamins and trace elements like copper, iron, and zinc can impair melanin synthesis and contribute to early onset of gray hair.

In daily life, maintaining regular sleep patterns, avoiding late nights, ensuring balanced nutrition, and consuming foods rich in trace elements and vitamins are essential. Additionally, learning to manage emotions and reduce psychological stress can help delay the progression of graying and support normal follicular physiological function through a healthy lifestyle.