Check up on your diet - are you taking sufficient proteins and vitamins to keep you healthy? Your hair thrives on protein, so the more protein you eat, the better. See you have plenty of lean meat, poultry, eggs, fish, nuts, and beans.
Also include Vitamin B in your diet. The best source of this is brewer's yeast. Take up to six tablets daily.
Minerals including iron and copper (found in meat and leafy green vegetables) and iodine (of which the best source is sea food), are important for the health of your hair. Iodine helps improve circulation of blood in the scalp.