In captivity， it is very important for reptiles to get their daily vitamins and minerals in their diet or else health complications may arise. Fluker's Calcium without Vitamin D3 Outdoor Reptile Supplement is great for making sure your reptile is getting every supplement he needs to lead a healthy and prolonged lifetime. This supplement is essential for all outdoor captive reptiles and amphibians or pets that are kept under very intense UVB lighting. It provides the calcium your pet needs for strong， healthy bones and vital bodily functions.