Vitamins For Bones Does Anyone Know Of Any Vitamins To Take For A Weak Immune System And Weak Bones?

Does anyone know of any vitamins to take for a weak immune system and weak bones? - vitamins for bones

My sister rhumetoid arthritis and lupus. Your joints begin to turn and is in pain every day. Does anyone know how drugs, nonprescription pain reliever for people with arthritis that works? In addition, taking supplements, to a weak immune system, and weak bones? Anyone who suffers from lupus and take a prescription drug that really works?