First of all, I am NOT or have NOT done this, I am only asking out of curiosity.

What if you supplemented/enriched a F/T rodent by adding a vitamin supplement? Like if you took a reptile vitamin supplement and made a very dilute vitamin solution, then inject it into the mouse with an oral syringe? Or dust the wet F/T with the powder

Would this do any good? Or would it be harmful? No effect at all?

I assume that if it was worthwhile then people would already have discovered it, but I figured I'd ask. It came across my mind when I was dusting crickets today for my chameleons