Was at the supermarket and saw a little plant nicely decorated and the tag above said aloe vera, so I got it. As I was looking at the bottom of the base, it says "a crassulaceae", which is something totally difrrent. It has succulent leaves but still found no info if it's safe for beardies.
If you want a really good plant, my suggestion is to use cilantro. It's edible and safe, and you can very much skimp out on making salad once in a while because the salad is provided. XD