Whole animals dont need it, except insects which you should dust with calcium and vit d3. Just another reason the whole animals diet is so much better than anything out there, period. Think of the mouse, or whatever as a convenient nutrient filled package that needs no supplements and you will automatically know what the ingredients are, I say this because if a product says "not for human consuption" the label doesnt have to have the truth in ingredients by law, so there could be anything in it. Besides the results speak for themselves alone. Ive seen monitors, tegus, etc that were switched to the whole animal diet that suddenly grew and in no time at all that looked like a different animal alltogether, where prior to that they were practically on their death bed. Ask anyone who has monitors breeding what they feed them, whole animal diet.