Ferr-Phos #4 is a cell salt that oxygenates the blood. Since oxygenated blood is a cleanser, this cell salt is beneficial for any kind of health problem. A German homeopathic physician, Dr. Schussler, identified 12 cell salts (mineral salts) that were all that was needed to maintain the body in perfect health and balance. A lack of a specific cell salt would result in a deficiency that would eventually lead to a symptom and possibly disease. By replacing the deficient cell salt, the balance was restored and healing took place.