Ferritin levels are not associated with hair health. Heavy periods and vegetarian diet could lead to iron deficiency, and low serum ferritin. It can be easily addressed by taking oral iron and multivitamins.
For good health – Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex.