Calcium Deficiency Is A Major Dietary Problem In Captive Reptiles. Exo Terra Calcium + D3 Powder Supplement Contains High Levels Of Phosphorus-Free Calcium As Well As Balanced Amounts Of Vitamin D3 For Optimal Calcium Absorption And To Help Ensure Long-Term Health. Vitamin D3 Aids In The Proper Absorption Of Calcium And Is Vital For Captive Reptiles Not Exposed To Natural Sunlight Or Ultraviolet Lights.Exo Terra Calcium + D3 Powder Supplement Is A Complementary Food For Reptiles.Contains The Essential Elements For Proper Calcium Metabolism Phosphorus Free Ultra Fine Powder For Reptiles Ingredients:Calcium Carbonate (35%), Ground Oyster Shells, Salt.Contains Eu Permitted Additives.Eu Typical Analysis:Calcium 35%, Vitamin D3 65 Mg/Kg.