White grubs are insect pests that are found in grass and turf. They are the larval or immature stages of certain beetles who chew off grass roots which are just below the soil surface.

So can bearded dragons eat white grubs at all?

Unfortunately they cant if they are not good for them to eat and they are a food to avoid giving them. There are much better foods to give them.

Image Fzurell at the German language Wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons