Calc-Sulph #3 is a cell salt that is a blood purifier and it is in all connective tissue in small amounts. It is useful for acne and other skin eruptions, colds or sore lips. 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.