Okay, I have been thinking. Once again this isnt good..... We try to do our best to make sure out chameleons are healthy. My question is about D3. Over supplementing with D3 can lead to all kinds of problems, some include; kidney failure, the calcification of blood vessels and organs, and death. When chameleons bask on there own they have not been reported suffering from these problems.(hypervitaminosis-D) They have a safety mechanism that prohibits them from producing to much vitamin D. The bulbs we use, Retisun 5.0, for the most part supply our chameleons with the "proper UVB" they need. These are sufficient for our animals to produce Vitamin D3 on there own. Which is only after it travels through the blood stream, into the liver, and processed Studies have proved that they can keep our animals from developing MBD. After reading Eric A's post about how he raised chameleons without any UVB lighting, and properly administering calcium with D3. For years he had no problems with MBD or similar calcium deficiency. So, why do we even supplement with D3? Is it really needed? Is one-two times a month a good saftey precaution?