Calcium

Take one capsule with water every 30 minutes during prolonged physical activity or sweating. Take up to 7 capsules daily, do not exceed this dose PURE Electrolyte Replacement in a capsule form are formulated to help maintain your body's electrolyte levels and to help replace minerals lost during sustained strenuous exercise. 

Electrolyte Replacement are ideal to take in hot conditions when extra electrolytes are needed. Containing electrolytes, sodium, potassium, magnesium and calcium, these tasteless vegan capsules  contain no added carbohydrates. Product code: 9421903716682 Cautions
Do not exceed recommended dosage

Insure adequate hydration Ingredients
Each capsule contains, 

Sodium chloride 440mg
Potassium citrate 150mg
Magnesium citrate 100mg
Calcium citrate 50mg