I used to have my nails done every three weeks so they looked nice when I visited clients. My Dr. put me on a high dose of Calcium,2/750mg,2/150mg magnesium, 2/750mg Vitamin D 1000mg Fish oil. My hair at 72 is lush and thick, my nails are long and strong. I haven't had a broken nail in over 6 months. My bone scan was, according the my dear DR. incredible for my age.