Hyland's Cell Salts #9 Natrum Muriaticum 6X provides natural relief for headaches, water retention and indigestion. Cell Salts #9 can soothe symptoms of headaches, constipation, heartburn, toothache, hay fever and water retention in women. Nat Mur also calms gastric upset and distress. #9 Natrum Muriaticum aids with water distribution problems, dry skin & chafing, headaches, and constipation. Cell Salts #9 maintains a proper degree of moisture throughout the system and aids nutrition.