Repti Calcium is an ultra-fine precipitated Calcium Carbonate Supplement with Vitamin D3. It is a phosphorus-free calcium supplement for reptiles and amphibians. The supplement has a unique shape/high surface area per gram resulting in increased calcium bioavailability and is free of harmful impurities (not from Oyster Shells). The supplement includes safe levels of Vitamin D3 and should be used for additional supplementation. Zoo Med Repti Calcium with D3 – Essential Calcium Supplement for Reptiles Zoo Med Repti Calcium with D3 is a premium, phosphorus-free calcium supplement designed to support robust bone health and prevent metabolic bone disease in reptiles. Fortified with Vitamin D3, it ensures optimal calcium absorption, making it an ideal choice for reptiles housed indoors or those with limited UV exposure. Key Features: Supports Bone Health: Promotes strong bone development and prevents metabolic bone disease. Vitamin D3 Enrichment: Enhances calcium absorption for proper metabolism, essential for reptiles lacking adequate UV exposure. Highly Bioavailable.