Hair grows roughly one centimeter per month, so it acts like a living timeline. Scientists were able to match gray segments to stressful life events and colorful regrowth to more relaxed periods. It all ties back to biological factors like cortisol, oxidative stress, and how your mitochondria are functioning.

So if you’re graying earlier than expected especially in your 20s or 30s it may not just be genetics at play. Your hair could be revealing something deeper, a subtle call from your body to slow down and restore balance.