Fluker's Calcium Supplement provides the calcium your pet needs for strong, healthy bones and vital bodily functions. By providing your reptiles with feeders coated in this dust, you are allowing them to absorb the calcium they need. Fluker's Calcium with Vitamin D3 is preferable for reptiles and amphibians that are kept indoors to aid in the absorption of calcium. For maximum effect, dust this powder on our Crickets & Live Feeder Insects. WHY USE FLUKER'S CALCIUM? Calcium is a critical essential nutrient for reptiles. A calcium deficiency can often result in pain, deformity and eventually death. Fluker's Calcium Supplement formula helps prevent this. Vitamin D3 has been added to aid in the assimilation and metabolism of the calcium. In addition, the formula's powder form ensures that it will adhere to the items fed.