noun
prematurely gray hair
Refers to gray hair that appears at a young age, often seen as a sign of stress or genetics.
彼は若白髪が多くて、よく年上に見られる。
He has a lot of prematurely gray hair and is often mistaken for being older.
若白髪は遺伝のせいかもしれない。
Prematurely gray hair might be due to genetics.