I haven't done any research that has led me to validate the idea that some combinations of vitmains and minerals negate each other (at least not calcium and the vitamins included in products we use supplement our reptiles' diets) but I DO know now that vitamin D3 can be toxic at high doses (it can cause kidney and liver damage in humans). However, I am not sure what consititutes a "high dose."

I have changed my routine--I now keep a supply of pure calcium in the enclosure and dust the food twice a week with calcium containing D3.

[ Show Entire Thread ]