Premature greying of hair can be caused by genetics, stress, and nutritional deficiencies like low Vitamin B12, iron, or thyroid imbalance. Lifestyle factors such as poor diet, smoking, and lack of sleep can also contribute. Treatment for premature greying mainly focuses on slowing further greying and improving hair health. Start by correcting any deficiencies, get tests for Vitamin B12, iron, and thyroid, and take supplements if needed under medical advice. Maintain a healthy diet rich in protein, green vegetables, fruits, nuts, and dairy. Manage stress through relaxation techniques, exercise, and proper sleep. Avoid smoking and harsh chemical hair products. You can also use mild hair oils (like coconut oil with amla) to support hair health. If needed, consult a dermatologist for medical treatments or guidance.