Schuessler Nat Mur Tissue Salt (Fluid Balance). Nat Mur (Sodium Chloride) is the water-distributing tissue salt. It enters into the compositition of every fluid and solid of the body.While we try to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Please note actual image may vary. Information on this site is not intended to diagnose or treat any health condition. We recommend that if you are pregnant, nursing, have a medical condition or are currently taking medication that you seek advice from a health professional before you take any dietary supplement. Always read the product directions before use and do not exceed the recommended intake. Food Supplements should not be taken as an alternative to a balanced diet. Keep out of reach of children.