Chalktab-835: Each tablet contains Chalk (Calcium Carbonate) 835 mg (equivalent to calcium 334 mg).
Chalktab-1.25: Each tablet contains Chalk (Calcium Carbonate) 1,250 mg (equivalent to calcium 500 mg).
Chalktab-1.5: Each tablet contains CHALK (Calcium Carbonate) 1,500 mg (equivalent to calcium 600 mg).