Repti Calcium is an ultra-fine Precipitated Calcium Carbonate Supplement withVitamin D3. It is a phosphorus-free calcium supplement for reptiles andamphibians. It has a unique shape/high surface area per gram resulting inincreased calcium bio-availability. * Highly bioavailable source of calcium carbonate. * Free of harmful impurities (not from Oyster Shells) * Safe levels of Vitamin D3; Use for additional supplementationINGREDIENTSPrecipitated Calcium Carbonate, Cholecalciferol (Source of Vitamin D3).GUARANTEED ANALYSISMoisture (max)1.0%Calcium (min)38.0%Calcium (max)43.0%Vitamin D3 (min)10,390 IU22,907 IU