F.M.Brown's Sons, Inc. - Purple Cuttlebone Calcium PowderCalcium is a critical essential nutrient for captive reptiles and amphibians. So we have chosen a natural calcium source from cuttlebone that is easily metabolized with the help of Vitamin D3. To make it highly palatable and readily accepted, we added a medley of delicious fruit powder along with Spirulina algae, nature's super food.Reptiles4 OZ - UPC: 42934515182