Same trusted and proven formula in a great new look! Contains 215g/kg sodium, 468.5g/kg chloride, 152g/kg potassium and 17.25g/kg magnesium. Sodium and Chloride: Common salt (NaCl), which is composed of two ions, sodium (Na+) and chloride (Cl-). They are the major electrolytes of the body. Potassium: One of potassium’s major roles is to maintain and ensure correct cellular osmotic pressure which affects the sensitivity of nerves and muscles to impulses. Horses suffering from a lack of potassium are prone to fatigue, muscle weakness, exercise intolerance, tying-up and decreased water intake. Magnesium: Magnesium plays a critical role as a co-factor in over 300 enzymatic reactions within the body. Magnesium is also required for muscle function and is essential for DNA to send messages to the cells. Calcium: Deficiencies of calcium in its ionic form may lead to muscle weakness and conditions such as tying-up and ‘thumps’