Zoo Med Repti Sun UVB Use with lizards (other than iguanas) to help prevent bone problems Strengthens and improves shell growth in all captive turtles and tortoises Eliminates the risk of Vitamin D3 overdose from synthetic sources by allowing reptiles the ability to regulate their own Vitamin D3 levels Increases appetite and physical activity, while helping to induce reproductive behaviors Beneficial to the psychological well-being of captive reptiles and amphibians