Supplies calcium, magnesium, phosphorus and potassium to ensure normal levels in the blood in cows before, during and after calving. Give one tube within 6â€“12 hours prior to calving. Give another tube within 6â€“12 hours after calving. Guaranteed Analysis â€¢ Calcium (min.), 13.5% (54 g) â€¢ Calcium (max.), 15.0% (60 g) â€¢ Phosphorus (min.), 2.5% (10 g) â€¢ Magnesium (min.), 0.725% (2.9 g) â€¢ Potassium (min.), 0.25% (1 g) Ingredients: Calcium chloride, gel base, calcium phosphate, magnesium chloride, potassium chloride.