Rep-Cal developed their Original Calcium with Vitamin D3 Powder Reptile Supplement. Not getting enough calcium can result in slower growth, fertility complications, and other issues. This formula is made with 100% natural oyster shell, phosphorus-free calcium carbonate, plus vitamin D3 to encourage normal calcium absorption. Add it to your buddy's favorite fruits, vegetables and pastes to give him the calcium boost he needs. Key Benefits: Adds calcium to your companion's diet to help him avoid issues associated with that deficiency. Crafted with 100% natural oyster shell calcium carbonate and vitamin D for calcium absorption. Specially formulated for reptiles and amphibians. Easy to use add the powder to your sidekick's favorite paste, fruits or vegetables. Made with zero preservatives or phosphorous.