You cannot completely stop white hair once follicles stop producing pigment
Eat a balanced diet with enough protein, vitamin B12, folate, iron, copper, zinc, and vitamin D
Manage stress with sleep, exercise, meditation, or counseling
Avoid smoking
Protect hair and scalp from excessive sun exposure
Avoid harsh chemical treatments and frequent heat styling
Treat underlying medical conditions such as thyroid disorders, anemia, or autoimmune disease
Review medications with a doctor if white hair started after a new treatment
Use hair dye or color products if you want to cover white hair
See a dermatologist if white hair appears suddenly, rapidly, or at a young age