Ingredients:All these ingredients are GRAS (generally recognized as safe) by the Food and Drug Administration (FDA).Magnesium sulfate heptahydrate (MgSO4·7H2O) is better known as Epsom salts, and has laxative properties when more than 2 teaspoons are ingested at one time. Epsom salts are sold in most drugstores and some grocery stores. 
Calcium chloride (CaCl2) is used to preserve the crispness of vegetables during pickling. Food grade calcium chloride is available from shops that provide ingredients for canning and food preservation. 
Sodium bicarbonate (NaHCO3), baking soda, is used as an antacid and a leavening agent in self-rising flours. It has wide application in making fluffy baked products. Baking soda is available in most grocery stores. Do not confuse baking soda with baking powder