Rep-Cal Research Labs Phosphorous-Free Calcium with Vitamin D3 is an excellent source of calcium for all reptiles and amphibians. Captive-bred reptiles and amphibians are highly susceptible to vitamin and mineral deficiencies, which can lead to a range of severe health issues such as slow growth, organ failure, reproductive complications, deformities, or even death. Ensuring that your pet gets sufficient calcium and vitamin D3 is crucial for their overall health and well-being. This original powdered supplement is made from 100% natural oyster shell calcium carbonate and is phosphorous-free. Vitamin D3 has been added to help improve calcium absorption. It is perfect for geckos, and many other reptiles, that will consume the calcium from a dish. This 5.5 oz (or 5.2 oz depending on the source) bottle is a reliable and pet-friendly product to meet your reptile's daily needs. Key features include: * Phosphorous-free formula * Fortified with Vitamin D3 for optimal calcium absorption * Made from 100% natural oyster shell calcium carbonate * Available in a 5.5 oz size * Ideal for reptiles and amphibians, especially geckos Give your reptile the calcium it needs to thrive with Rep-Cal Research Labs Phosphorous-Free Calcium with Vitamin D3!