@medexplained3: Why does hair turn gray or white? 🧬🧑🦳 It starts inside the hair follicle. As the pigment-producing system changes with age, less melanin reaches newly growing hair. ↓ Melanocyte Function → ↓ Melanin → Gray/White Hair #GrayHair #WhiteHair #Melanin #HairFollicle#learnontiktok